diff --git a/CMakeLists.txt b/CMakeLists.txt
index 928a5fbe9571..3639c07dfa99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,11 +80,7 @@ endif (BUILD_WEBENGINE)
 
 set(SCRIPT_INTERFACE  TRUE)
 #  Look for Qt5
-if (SCRIPT_INTERFACE)
-SET(QT_MIN_VERSION    "5.8.0")
-else (SCRIPT_INTERFACE)
-SET(QT_MIN_VERSION    "5.7.0")
-endif (SCRIPT_INTERFACE)
+SET(QT_MIN_VERSION    "5.15.0")
 # Include modules
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/build" ${CMAKE_MODULE_PATH})
 include (FindQt5)
diff --git a/awl/pitchlabel.cpp b/awl/pitchlabel.cpp
index 93cef715c709..1e4414cb7136 100644
--- a/awl/pitchlabel.cpp
+++ b/awl/pitchlabel.cpp
@@ -57,13 +57,8 @@ QSize PitchLabel::sizeHint() const
     QFontMetrics fm(font());
     int fw = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
     int h  = fm.height() + fw * 2;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
 //      int w = 2 + fm.horizontalAdvance(QString("A#8")) +  fw * 4;
     int w = 2 + fm.horizontalAdvance(QString("-9999")) + fw * 4;       // must display 14Bit controller values
-#else
-//      int w = 2 + fm.width(QString("A#8")) +  fw * 4;
-    int w = 2 + fm.width(QString("-9999")) + fw * 4;       // must display 14Bit controller values
-#endif
     return QSize(w, h).expandedTo(QApplication::globalStrut());
 }
 
diff --git a/awl/poslabel.cpp b/awl/poslabel.cpp
index 6ec9bc53cca3..29021f721eee 100644
--- a/awl/poslabel.cpp
+++ b/awl/poslabel.cpp
@@ -68,19 +68,11 @@ QSize PosLabel::sizeHint() const
     int fw = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
     int h  = fm.height() + fw * 2;
     int w;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
     if (_smpte) {
         w = 2 + fm.horizontalAdvance('9') * 9 + fm.horizontalAdvance(':') * 3 + fw * 4;
     } else {
         w = 2 + fm.horizontalAdvance('9') * 9 + fm.horizontalAdvance('.') * 2 + fw * 4;
     }
-#else
-    if (_smpte) {
-        w  = 2 + fm.width('9') * 9 + fm.width(':') * 3 + fw * 4;
-    } else {
-        w  = 2 + fm.width('9') * 9 + fm.width('.') * 2 + fw * 4;
-    }
-#endif
     return QSize(w, h).expandedTo(QApplication::globalStrut());
 }
 
diff --git a/framework/ui/view/qmldialog.cpp b/framework/ui/view/qmldialog.cpp
index ec964aeb094a..c69e1a8e13aa 100644
--- a/framework/ui/view/qmldialog.cpp
+++ b/framework/ui/view/qmldialog.cpp
@@ -63,11 +63,7 @@ void QmlDialog::componentComplete()
 
     if (m_content) {
         QQmlEngine* engine = nullptr;
-#if QT_VERSION < QT_VERSION_CHECK(5, 12, 0)
-        engine = framework::ioc()->resolve<framework::IUiEngine>("appshell")->qmlEngine();
-#else
         engine = m_content->engine();
-#endif
 
         m_view = new QQuickView(engine, nullptr);
         m_view->setResizeMode(QQuickView::SizeRootObjectToView);
diff --git a/framework/uicomponents/view/validators/doubleinputvalidator.cpp b/framework/uicomponents/view/validators/doubleinputvalidator.cpp
index 0f5d96a8eded..50f9cb10b124 100644
--- a/framework/uicomponents/view/validators/doubleinputvalidator.cpp
+++ b/framework/uicomponents/view/validators/doubleinputvalidator.cpp
@@ -27,11 +27,7 @@ void DoubleInputValidator::fixup(QString& string) const
         string.append(zeros(m_decimal));
     }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList strList = string.split(".", Qt::SkipEmptyParts);
-#else
-    QStringList strList = string.split(".", QString::SkipEmptyParts);
-#endif
 
     QString intPart = strList.at(0);
     QString floatPart = strList.at(1);
diff --git a/libmscore/chordlist.cpp b/libmscore/chordlist.cpp
index 87b096d06ef9..90cc671ddb67 100644
--- a/libmscore/chordlist.cpp
+++ b/libmscore/chordlist.cpp
@@ -29,11 +29,7 @@ HChord::HChord(const QString& str)
         { "C", "Db", "D", "Eb", "E", "F", "Gb", "G", "Ab", "A", "Bb", "B" }
     };
     keys = 0;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList sl = str.split(" ", Qt::SkipEmptyParts);
-#else
-    QStringList sl = str.split(" ", QString::SkipEmptyParts);
-#endif
     for (const QString& s : sl) {
         for (int i = 0; i < 12; ++i) {
             if (s == scaleNames[0][i] || s == scaleNames[1][i]) {
@@ -320,18 +316,10 @@ void HChord::add(const QList<HDegree>& degreeList)
 static void readRenderList(QString val, QList<RenderAction>& renderList)
 {
     renderList.clear();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList sl = val.split(" ", Qt::SkipEmptyParts);
-#else
-    QStringList sl = val.split(" ", QString::SkipEmptyParts);
-#endif
     for (const QString& s : sl) {
         if (s.startsWith("m:")) {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
             QStringList ssl = s.split(":", Qt::SkipEmptyParts);
-#else
-            QStringList ssl = s.split(":", QString::SkipEmptyParts);
-#endif
             if (ssl.size() == 3) {
                 // m:x:y
                 RenderAction a;
diff --git a/libmscore/figuredbass.cpp b/libmscore/figuredbass.cpp
index cfceecf4e13a..4212ea77b350 100644
--- a/libmscore/figuredbass.cpp
+++ b/libmscore/figuredbass.cpp
@@ -1389,11 +1389,7 @@ void FiguredBass::endEdit(EditData& ed)
     }
 
     // split text into lines and create an item for each line
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList list = txt.split("\n", Qt::SkipEmptyParts);
-#else
-    QStringList list = txt.split('\n', QString::SkipEmptyParts);
-#endif
     qDeleteAll(items);
     items.clear();
     QString normalizedText = QString();
diff --git a/libmscore/harmony.cpp b/libmscore/harmony.cpp
index 16a0017e2687..17cc3d628822 100644
--- a/libmscore/harmony.cpp
+++ b/libmscore/harmony.cpp
@@ -2103,11 +2103,7 @@ QString Harmony::generateScreenReaderInfo() const
         aux = aux.replace("#", QObject::tr("♯")).replace("<", "");
         QString extension = "";
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
         for (QString s : aux.split(">", Qt::SkipEmptyParts)) {
-#else
-        for (QString s : aux.split(">", QString::SkipEmptyParts)) {
-#endif
             if (!s.contains("blues")) {
                 s.replace("b", QObject::tr("♭"));
             }
diff --git a/libmscore/lyrics.cpp b/libmscore/lyrics.cpp
index 10d6e7e0e89e..3934a5583218 100644
--- a/libmscore/lyrics.cpp
+++ b/libmscore/lyrics.cpp
@@ -402,11 +402,7 @@ void Lyrics::paste(EditData& ed)
 #endif
     QString txt = QApplication::clipboard()->text(mode);
     QString regex = QString("[^\\S") + QChar(0xa0) + QChar(0x202F) + "]+";
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList sl = txt.split(QRegExp(regex), Qt::SkipEmptyParts);
-#else
-    QStringList sl = txt.split(QRegExp(regex), QString::SkipEmptyParts);
-#endif
     if (sl.empty()) {
         return;
     }
diff --git a/libmscore/mscore.cpp b/libmscore/mscore.cpp
index 906d95faa70d..8709f7e7bf6f 100644
--- a/libmscore/mscore.cpp
+++ b/libmscore/mscore.cpp
@@ -396,20 +396,6 @@ void MScore::init()
         }
     }
 
-#endif
-// Workaround for QTBUG-73241 (solved in Qt 5.12.2) in Windows 10, see https://musescore.org/en/node/280244
-#if defined(Q_OS_WIN) && (QT_VERSION < QT_VERSION_CHECK(5, 12, 2))
-    if (QOperatingSystemVersion::current().majorVersion() >= 10) {
-        const QDir additionalFontsDir(QString("%1/Microsoft/Windows/Fonts").arg(QStandardPaths::writableLocation(QStandardPaths::
-                                                                                                                 GenericDataLocation)));
-        if (additionalFontsDir.exists()) {
-            QFileInfoList fileList = additionalFontsDir.entryInfoList();
-            for (int i = 0; i < fileList.size(); ++i) {
-                QFileInfo fileInfo = fileList.at(i);
-                QFontDatabase::addApplicationFont(fileInfo.filePath());
-            }
-        }
-    }
 #endif
     initScoreFonts();
     StaffType::initStaffTypes();
diff --git a/libmscore/page.cpp b/libmscore/page.cpp
index 6773bcf4e608..f912c7fa3fc3 100644
--- a/libmscore/page.cpp
+++ b/libmscore/page.cpp
@@ -356,17 +356,10 @@ QString Page::replaceTextMacros(const QString& s) const
             case 'D':
             {
                 QString creationDate = score()->metaTag("creationDate");
-                if (creationDate.isNull())
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
-                {   // ToDo for Qt 5.15: Qt::DefaultLocaleShortDate vs. QLocale ??
+                if (creationDate.isNull()) {
+                    // ToDo for Qt 5.15: Qt::DefaultLocaleShortDate vs. QLocale ??
                     d += masterScore()->fileInfo()->birthTime().date().toString(Qt::DefaultLocaleShortDate);
-                }
-#else
-                {
-                    d += masterScore()->fileInfo()->created().date().toString(Qt::DefaultLocaleShortDate);
-                }
-#endif
-                else {
+                } else {
                     // ToDo for Qt 5.15: Qt::DefaultLocaleShortDate vs. QLocale ??
                     d += QDate::fromString(creationDate, Qt::ISODate).toString(Qt::DefaultLocaleShortDate);
                 }
diff --git a/libmscore/read114.cpp b/libmscore/read114.cpp
index b237046b72c8..e9d9bac79472 100644
--- a/libmscore/read114.cpp
+++ b/libmscore/read114.cpp
@@ -1303,11 +1303,7 @@ static void readVolta114(XmlReader& e, Volta* volta)
         const QStringRef& tag(e.name());
         if (tag == "endings") {
             QString s = e.readElementText();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
             QStringList sl = s.split(",", Qt::SkipEmptyParts);
-#else
-            QStringList sl = s.split(",", QString::SkipEmptyParts);
-#endif
             volta->endings().clear();
             for (const QString& l : sl) {
                 int i = l.simplified().toInt();
diff --git a/libmscore/read206.cpp b/libmscore/read206.cpp
index 819753e6afb8..aa2f3ec50188 100644
--- a/libmscore/read206.cpp
+++ b/libmscore/read206.cpp
@@ -2435,11 +2435,7 @@ static void readVolta206(XmlReader& e, Volta* volta)
         const QStringRef& tag(e.name());
         if (tag == "endings") {
             QString s = e.readElementText();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
             QStringList sl = s.split(",", Qt::SkipEmptyParts);
-#else
-            QStringList sl = s.split(",", QString::SkipEmptyParts);
-#endif
             volta->endings().clear();
             for (const QString& l : sl) {
                 int i = l.simplified().toInt();
diff --git a/libmscore/scorediff.cpp b/libmscore/scorediff.cpp
index ab69129b47c2..0e22f828c687 100644
--- a/libmscore/scorediff.cpp
+++ b/libmscore/scorediff.cpp
@@ -127,17 +127,10 @@ std::vector<TextDiff> MscxModeDiff::lineModeDiff(const QString& s1, const QStrin
     typedef std::pair<elem, dtl::elemInfo> sesElem;
     typedef std::vector<sesElem> sesElemVec;
 
-# if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     const QVector<QStringRef> linesVec1 = s1.splitRef('\n');
     std::vector<QStringRef> lines1(linesVec1.begin(), linesVec1.end());
     const QVector<QStringRef> linesVec2 = s2.splitRef('\n');
     std::vector<QStringRef> lines2(linesVec2.begin(), linesVec2.end());
-#else
-    // QVector does not contain range constructor used inside dtl
-    // so we have to convert to std::vector.
-    std::vector<QStringRef> lines1 = s1.splitRef('\n').toStdVector();
-    std::vector<QStringRef> lines2 = s2.splitRef('\n').toStdVector();
-#endif
     dtl::Diff<QStringRef, std::vector<QStringRef> > diff(lines1, lines2);
 
     diff.compose();
diff --git a/libmscore/staff.cpp b/libmscore/staff.cpp
index f6527d319b82..3f6a7f3a752f 100644
--- a/libmscore/staff.cpp
+++ b/libmscore/staff.cpp
@@ -157,11 +157,7 @@ void Staff::swapBracket(int oldIdx, int newIdx)
     fillBrackets(idx);
     _brackets[oldIdx]->setColumn(newIdx);
     _brackets[newIdx]->setColumn(oldIdx);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
     _brackets.swapItemsAt(oldIdx, newIdx);
-#else
-    _brackets.swap(oldIdx, newIdx);
-#endif
     cleanBrackets();
 }
 
@@ -179,11 +175,7 @@ void Staff::changeBracketColumn(int oldColumn, int newColumn)
         int newIdx = i + step;
         _brackets[oldIdx]->setColumn(newIdx);
         _brackets[newIdx]->setColumn(oldIdx);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
         _brackets.swapItemsAt(oldIdx, newIdx);
-#else
-        _brackets.swap(oldIdx, newIdx);
-#endif
     }
     cleanBrackets();
 }
diff --git a/libmscore/undo.cpp b/libmscore/undo.cpp
index 20b2982847d6..4d8da8c2aed5 100644
--- a/libmscore/undo.cpp
+++ b/libmscore/undo.cpp
@@ -2067,11 +2067,7 @@ void RemoveExcerpt::redo(EditData*)
 
 void SwapExcerpt::flip(EditData*)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
     score->excerpts().swapItemsAt(pos1, pos2);
-#else
-    score->excerpts().swap(pos1, pos2);
-#endif
     score->setExcerptsChanged(true);
 }
 
diff --git a/libmscore/volta.cpp b/libmscore/volta.cpp
index cf6fc4bb129f..db9bfaf54ba6 100644
--- a/libmscore/volta.cpp
+++ b/libmscore/volta.cpp
@@ -145,11 +145,7 @@ void Volta::read(XmlReader& e)
         const QStringRef& tag(e.name());
         if (tag == "endings") {
             QString s = e.readElementText();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
             QStringList sl = s.split(",", Qt::SkipEmptyParts);
-#else
-            QStringList sl = s.split(",", QString::SkipEmptyParts);
-#endif
             _endings.clear();
             for (const QString& l : sl) {
                 int i = l.simplified().toInt();
diff --git a/libmscore/xmlwriter.cpp b/libmscore/xmlwriter.cpp
index f2a22d240e17..199fad0a97f1 100644
--- a/libmscore/xmlwriter.cpp
+++ b/libmscore/xmlwriter.cpp
@@ -14,11 +14,6 @@
 #include "property.h"
 #include "scoreElement.h"
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-#define endl Qt::endl
-#define dec Qt::dec
-#endif
-
 namespace Ms {
 //---------------------------------------------------------
 //   Xml
@@ -78,7 +73,7 @@ void XmlWriter::header()
 void XmlWriter::stag(const QString& s)
 {
     putLevel();
-    *this << '<' << s << '>' << endl;
+    *this << '<' << s << '>' << Qt::endl;
     stack.append(s.split(' ')[0]);
 }
 
@@ -104,7 +99,7 @@ void XmlWriter::stag(const QString& name, const ScoreElement* se, const QString&
     if (!attributes.isEmpty()) {
         *this << ' ' << attributes;
     }
-    *this << '>' << endl;
+    *this << '>' << Qt::endl;
     stack.append(name);
 
     if (_recordElements) {
@@ -120,7 +115,7 @@ void XmlWriter::stag(const QString& name, const ScoreElement* se, const QString&
 void XmlWriter::etag()
 {
     putLevel();
-    *this << "</" << stack.takeLast() << '>' << endl;
+    *this << "</" << stack.takeLast() << '>' << Qt::endl;
 }
 
 //---------------------------------------------------------
@@ -138,7 +133,7 @@ void XmlWriter::tagE(const char* format, ...)
     vsnprintf(buffer, BS, format, args);
     *this << buffer;
     va_end(args);
-    *this << "/>" << endl;
+    *this << "/>" << Qt::endl;
 }
 
 //---------------------------------------------------------
@@ -169,7 +164,7 @@ void XmlWriter::ntag(const char* name)
 
 void XmlWriter::netag(const char* s)
 {
-    *this << "</" << s << '>' << endl;
+    *this << "</" << s << '>' << Qt::endl;
 }
 
 //---------------------------------------------------------
@@ -325,7 +320,7 @@ void XmlWriter::tag(const char* name, const QWidget* g)
 void XmlWriter::comment(const QString& text)
 {
     putLevel();
-    *this << "<!-- " << text << " -->" << endl;
+    *this << "<!-- " << text << " -->" << Qt::endl;
 }
 
 //---------------------------------------------------------
@@ -381,7 +376,7 @@ void XmlWriter::dump(int len, const unsigned char* p)
     for (int i = 0; i < len; ++i, ++col) {
         if (col >= 16) {
             setFieldWidth(0);
-            *this << endl;
+            *this << Qt::endl;
             col = 0;
             putLevel();
             setFieldWidth(5);
@@ -389,7 +384,7 @@ void XmlWriter::dump(int len, const unsigned char* p)
         *this << (p[i] & 0xff);
     }
     if (col) {
-        *this << endl << dec;
+        *this << Qt::endl << Qt::dec;
     }
     setFieldWidth(0);
     setIntegerBase(10);
diff --git a/mscore/chordview.cpp b/mscore/chordview.cpp
index eae43904d9f7..a05d35ff6355 100644
--- a/mscore/chordview.cpp
+++ b/mscore/chordview.cpp
@@ -415,17 +415,8 @@ void ChordView::wheelEvent(QWheelEvent* event)
             emit xposChanged(xpos);
         }
     } else if (event->modifiers() == Qt::ShiftModifier) {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
-# if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         QWheelEvent we(event->position(), event->globalPosition(), event->pixelDelta(), event->angleDelta(),
                        event->buttons(), event->modifiers(), event->phase(), event->inverted(), event->source());
-# else
-        QWheelEvent we(event->pos(), event->globalPos(), event->pixelDelta(), event->angleDelta(), event->buttons(),
-                       event->modifiers(), event->phase(), event->inverted(), event->source());
-# endif
-#else
-        QWheelEvent we(event->pos(), event->delta(), event->buttons(), 0, Qt::Horizontal);
-#endif
         QGraphicsView::wheelEvent(&we);
     } else if (event->modifiers() == 0) {
         QGraphicsView::wheelEvent(event);
diff --git a/mscore/cloud/uploadscoredialog.cpp b/mscore/cloud/uploadscoredialog.cpp
index ec35b184539e..f1a16d212a67 100644
--- a/mscore/cloud/uploadscoredialog.cpp
+++ b/mscore/cloud/uploadscoredialog.cpp
@@ -101,11 +101,7 @@ void UploadScoreDialog::upload(int nid)
 {
     Score* score = mscore->currentScore()->masterScore();
     const QString scoreTitle = title->text().trimmed().isEmpty() ? score->title() : title->text();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
     QString path = QDir::tempPath() + QString("/temp_%1.mscz").arg(QRandomGenerator::global()->generate() % 100000);
-#else
-    QString path = QDir::tempPath() + QString("/temp_%1.mscz").arg(qrand() % 100000);
-#endif
     if (mscore->saveAs(score, true, path, "mscz")) {
         _nid = nid;
         _loginManager->upload(path, nid, scoreTitle);
diff --git a/mscore/debugger/debugger.cpp b/mscore/debugger/debugger.cpp
index 323a1cd5de09..571faca401f5 100644
--- a/mscore/debugger/debugger.cpp
+++ b/mscore/debugger/debugger.cpp
@@ -1873,11 +1873,7 @@ QSize DoubleLabel::sizeHint() const
     QFontMetrics fm = fontMetrics();
     int h           = fm.height() + 4;
     int n           = 3 + 3;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
     int w = fm.horizontalAdvance(QString("-0.")) + fm.horizontalAdvance('0') * n + 6;
-#else
-    int w = fm.width(QString("-0.")) + fm.width('0') * n + 6;
-#endif
     return QSize(w, h);
 }
 
diff --git a/mscore/drumview.cpp b/mscore/drumview.cpp
index fdc50cabd5f2..79eae01598e2 100644
--- a/mscore/drumview.cpp
+++ b/mscore/drumview.cpp
@@ -417,17 +417,8 @@ void DrumView::wheelEvent(QWheelEvent* event)
             emit xposChanged(xpos);
         }
     } else if (event->modifiers() == Qt::ShiftModifier) {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
-# if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         QWheelEvent we(event->position(), event->globalPosition(), event->pixelDelta(), event->angleDelta(),
                        event->buttons(), event->modifiers(), event->phase(), event->inverted(), event->source());
-# else
-        QWheelEvent we(event->pos(), event->globalPos(), event->pixelDelta(), event->angleDelta(), event->buttons(),
-                       event->modifiers(), event->phase(), event->inverted(), event->source());
-# endif
-#else
-        QWheelEvent we(event->pos(), event->delta(), event->buttons(), 0, Qt::Horizontal);
-#endif
         QGraphicsView::wheelEvent(&we);
     } else if (event->modifiers() == 0) {
         QGraphicsView::wheelEvent(event);
diff --git a/mscore/events.cpp b/mscore/events.cpp
index 4e7b728fc19c..e905e9da6eb7 100644
--- a/mscore/events.cpp
+++ b/mscore/events.cpp
@@ -179,11 +179,7 @@ void ScoreView::wheelEvent(QWheelEvent* event)
 
     if (event->modifiers() & Qt::ControlModifier) {   // Windows touch pad pinches also execute this
         QApplication::sendPostedEvents(this, 0);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         zoomStep(nReal, event->position().toPoint());
-#else
-        zoomStep(nReal, event->pos());
-#endif
         return;
     }
 
diff --git a/mscore/fotomode.cpp b/mscore/fotomode.cpp
index 2a2fc5df9c06..1c1ed052aa6d 100644
--- a/mscore/fotomode.cpp
+++ b/mscore/fotomode.cpp
@@ -378,10 +378,8 @@ void ScoreView::fotoContextPopup(QContextMenuEvent* ev)
                                                     tr("Set output resolution for PNG"),
                                                     preferences.getDouble(PREF_EXPORT_PNG_RESOLUTION),
                                                     16.0, 2400.0, 1,
-                                                    &ok
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-                                                    , {}, 1.0
-#endif
+                                                    &ok,
+                                                    {}, 1.0
                                                     );
         if (ok) {
             preferences.setPreference(PREF_EXPORT_PNG_RESOLUTION, resolution);
diff --git a/mscore/importmidi_ui/importmidi_delegate.cpp b/mscore/importmidi_ui/importmidi_delegate.cpp
index b23df6d84f33..bbd8e6a136d0 100644
--- a/mscore/importmidi_ui/importmidi_delegate.cpp
+++ b/mscore/importmidi_ui/importmidi_delegate.cpp
@@ -298,11 +298,7 @@ void OperationsDelegate::drawArrow(
     const int height = 4;
     const int width = 8;
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
     const int textWidth = fm.horizontalAdvance(index.data(Qt::DisplayRole).toString());
-#else
-    const int textWidth = fm.width(index.data(Qt::DisplayRole).toString());
-#endif
     const int x = rightArrowAlign
                   ? option.rect.right() - width - gap
                   : option.rect.left() + textWidth + gap;
diff --git a/mscore/importmidi_ui/importmidi_panel.cpp b/mscore/importmidi_ui/importmidi_panel.cpp
index 228f36d4ad8f..4f21867bd89e 100644
--- a/mscore/importmidi_ui/importmidi_panel.cpp
+++ b/mscore/importmidi_ui/importmidi_panel.cpp
@@ -156,11 +156,7 @@ void ImportMidiPanel::fillCharsetList()
         if (charset == MidiCharset::defaultCharset()) {
             _ui->comboBoxCharset->setCurrentIndex(idx);
         }
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
         int newWidth = fm.horizontalAdvance(charset);
-#else
-        int newWidth = fm.width(charset);
-#endif
         if (newWidth > maxWidth) {
             maxWidth = newWidth;
         }
diff --git a/mscore/musescore.cpp b/mscore/musescore.cpp
index 0b3f62b8d40f..dcb5c5296bd2 100644
--- a/mscore/musescore.cpp
+++ b/mscore/musescore.cpp
@@ -191,10 +191,6 @@ Q_LOGGING_CATEGORY(undoRedo, "undoRedo", QtCriticalMsg);
 #include "telemetrymanager.h"
 #include "global/context/scorestateobserver.h"
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-# define endl Qt::endl
-#endif
-
 namespace Ms {
 MuseScore* mscore;
 MasterSynthesizer* synti;
@@ -3643,10 +3639,10 @@ bool MuseScore::runTestScripts(const QStringList& scriptFiles)
         while (!scores().empty()) {
             closeScore(scores().back());
         }
-        QTextStream(stdout) << "Start test: " << scriptFile << endl;
+        QTextStream(stdout) << "Start test: " << scriptFile << Qt::endl;
         std::unique_ptr<Script> script = Script::fromFile(scriptFile);
         const bool pass = script->execute(ctx);
-        QTextStream(stdout) << "Test " << scriptFile << (pass ? " PASS" : " FAIL") << endl;
+        QTextStream(stdout) << "Test " << scriptFile << (pass ? " PASS" : " FAIL") << Qt::endl;
         ++total;
         if (pass) {
             ++passed;
@@ -3654,7 +3650,7 @@ bool MuseScore::runTestScripts(const QStringList& scriptFiles)
             allPassed = false;
         }
     }
-    QTextStream(stdout) << "Test scripts: total: " << total << ", passed: " << passed << endl;
+    QTextStream(stdout) << "Test scripts: total: " << total << ", passed: " << passed << Qt::endl;
     return allPassed;
 }
 
@@ -4204,10 +4200,10 @@ static bool processNonGui(const QStringList& argv)
         ScoreDiff diff(s1, s2, /* textDiffOnly */ !diffMode);
 
         if (rawDiffMode) {
-            QTextStream(stdout) << diff.rawDiff() << endl;
+            QTextStream(stdout) << diff.rawDiff() << Qt::endl;
         }
         if (diffMode) {
-            QTextStream(stdout) << diff.userDiff() << endl;
+            QTextStream(stdout) << diff.userDiff() << Qt::endl;
         }
 
         delete s1;
@@ -4234,23 +4230,23 @@ static void mscoreMessageHandler(QtMsgType type, const QMessageLogContext& conte
     switch (type) {
     case QtInfoMsg:
         err << "Info: " << localMsg.constData() << " (" << context.file << ":" << context.line << ", "
-            << context.function << ")" << endl;
+            << context.function << ")" << Qt::endl;
         break;
     case QtDebugMsg:
         err << "Debug: " << localMsg.constData() << " (" << context.file << ":" << context.line << ", "
-            << context.function << ")" << endl;
+            << context.function << ")" << Qt::endl;
         break;
     case QtWarningMsg:
         err << "Warning: " << localMsg.constData() << " (" << context.file << ":" << context.line << ", "
-            << context.function << ")" << endl;
+            << context.function << ")" << Qt::endl;
         break;
     case QtCriticalMsg:  // same as QtSystemMsg
         err << "Critical: " << localMsg.constData() << " (" << context.file << ":" << context.line << ", "
-            << context.function << ")" << endl;
+            << context.function << ")" << Qt::endl;
         break;
     case QtFatalMsg:  // set your breakpoint here, if you want to catch the abort
         err << "Fatal: " << localMsg.constData() << " (" << context.file << ":" << context.line << ", "
-            << context.function << ")" << endl;
+            << context.function << ")" << Qt::endl;
         abort();
     }
 }
diff --git a/mscore/navigator.cpp b/mscore/navigator.cpp
index 95ce3e7ab669..bfb22c0172f6 100644
--- a/mscore/navigator.cpp
+++ b/mscore/navigator.cpp
@@ -365,11 +365,7 @@ void Navigator::paintEvent(QPaintEvent* ev)
     QFont font("FreeSans", 4000);
     QFontMetrics fm(font);
     Page* firstPage = _score->pages()[0];
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
     qreal factor = (firstPage->width() * 0.5) / fm.horizontalAdvance(QString::number(_score->pages().size()));
-#else
-    qreal factor = (firstPage->width() * 0.5) / fm.width(QString::number(_score->pages().size()));
-#endif
     font.setPointSizeF(font.pointSizeF() * factor);
 
     p.setTransform(matrix);
diff --git a/mscore/pianoroll/pianoview.cpp b/mscore/pianoroll/pianoview.cpp
index 7cdfcad98d9d..0a63c26afb35 100644
--- a/mscore/pianoroll/pianoview.cpp
+++ b/mscore/pianoroll/pianoview.cpp
@@ -582,32 +582,15 @@ void PianoView::wheelEvent(QWheelEvent* event)
         QGraphicsView::wheelEvent(event);
     } else if (event->modifiers() == Qt::ShiftModifier) {
         //Horizontal scroll
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
-# if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         QWheelEvent we(event->position(), event->globalPosition(), event->pixelDelta(), event->angleDelta(),
                        event->buttons(), event->modifiers(), event->phase(), event->inverted(), event->source());
-# else
-        QWheelEvent we(event->pos(), event->globalPos(), event->pixelDelta(), event->angleDelta(), event->buttons(),
-                       event->modifiers(), event->phase(), event->inverted(), event->source());
-# endif
-#else
-        QWheelEvent we(event->pos(), event->delta(), event->buttons(), 0, Qt::Horizontal);
-#endif
         QGraphicsView::wheelEvent(&we);
     } else if (event->modifiers() == Qt::ControlModifier) {
         //Vertical zoom
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         zoomView(step, false, event->position().x(), event->position().y());
-#else
-        zoomView(step, false, event->x(), event->y());
-#endif
     } else if (event->modifiers() == (Qt::ShiftModifier | Qt::ControlModifier)) {
         //Horizontal zoom
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 1)) //???
         zoomView(step, true, event->position().x(), event->position().y());
-#else
-        zoomView(step, true, event->x(), event->y());
-#endif
     }
 }
 
diff --git a/mscore/plugin/qmledit.cpp b/mscore/plugin/qmledit.cpp
index 0a97087c2a9a..ef208b8b4cef 100644
--- a/mscore/plugin/qmledit.cpp
+++ b/mscore/plugin/qmledit.cpp
@@ -283,11 +283,7 @@ QStringList JSHighlighter::keywords() const
 
 void JSHighlighter::setKeywords(const QStringList& keywords)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     m_keywords = QSet<QString>(keywords.begin(), keywords.end());
-#else
-    m_keywords = QSet<QString>::fromList(keywords);
-#endif
     rehighlight();
 }
 
diff --git a/mscore/qml/nativemenu.h b/mscore/qml/nativemenu.h
index 75a15bd145a4..ac4b03030470 100644
--- a/mscore/qml/nativemenu.h
+++ b/mscore/qml/nativemenu.h
@@ -42,11 +42,7 @@ class QmlNativeMenu : public QQuickItem
 
     Q_PROPERTY(bool visible READ visible WRITE setVisible NOTIFY visibleChanged)
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
     QQmlListProperty<QObject> contentData() { return QQmlListProperty<QObject>(this, &_contentData); }   // TODO: use different QQmlListProperty constructor?
-#else
-    QQmlListProperty<QObject> contentData() { return QQmlListProperty<QObject>(this, _contentData); }   // TODO: use different QQmlListProperty constructor?
-#endif
 
     QMenu* createMenu() const;
     void showMenu(QPoint p);
diff --git a/mscore/qmldockwidget.cpp b/mscore/qmldockwidget.cpp
index bb5e990b5d7a..265c62ce16c5 100644
--- a/mscore/qmldockwidget.cpp
+++ b/mscore/qmldockwidget.cpp
@@ -298,17 +298,6 @@ void QmlDockWidget::changeEvent(QEvent* evt)
     case QEvent::StyleChange:
         setupStyle();
         break;
-#if (QT_VERSION < QT_VERSION_CHECK(5, 10, 0))
-    case QEvent::LanguageChange:
-        // In the absence of QQmlEngine::retranslate() function, just
-        // reload the entire QML view. Qt 5.10 and above seem to
-        // handle retranslation in Qt Quick itself so no explicit
-        // retranslation is required.
-        if (_view) {
-            _view->setSource(_view->source());
-        }
-        break;
-#endif
     default:
         break;
     }
diff --git a/mscore/scorePreview.cpp b/mscore/scorePreview.cpp
index 373faab97209..39ab25619e20 100644
--- a/mscore/scorePreview.cpp
+++ b/mscore/scorePreview.cpp
@@ -52,11 +52,7 @@ void ScorePreview::setScore(const ScoreInfo& si)
 {
     scoreInfo = si;
     name->setText(si.completeBaseName());
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
     creationDate->setText(si.birthTime().toString());
-#else
-    creationDate->setText(si.created().toString());
-#endif
     fileSize->setText(QString("%1 KiB").arg(si.size() / 1024));
     name->setEnabled(true);
     creationDate->setEnabled(true);
diff --git a/mscore/script/script.cpp b/mscore/script/script.cpp
index e660ccc9789f..d9b43f50cdf7 100644
--- a/mscore/script/script.cpp
+++ b/mscore/script/script.cpp
@@ -19,10 +19,6 @@
 
 #include "libmscore/score.h"
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-#define endl Qt::endl
-#endif
-
 namespace Ms {
 //---------------------------------------------------------
 //   ScriptContext
@@ -59,7 +55,7 @@ bool Script::execute(ScriptContext& ctx) const
     for (const auto& e : _entries) {
         if (e) {
             if (!e->execute(ctx)) {
-                ctx.execLog() << "Script::execute: operation failed:" << e->serialize() << endl;
+                ctx.execLog() << "Script::execute: operation failed:" << e->serialize() << Qt::endl;
                 if (ctx.stopOnError()) {
                     return false;
                 }
@@ -147,7 +143,7 @@ void ScriptRecorder::syncRecord()
         return;
     }
     for (; _recorded < _script.nentries(); ++_recorded) {
-        _stream << _script.entry(_recorded).serialize() << endl;
+        _stream << _script.entry(_recorded).serialize() << Qt::endl;
     }
 }
 
diff --git a/mscore/script/testscript.cpp b/mscore/script/testscript.cpp
index e0393b0d1392..a3c26151e1bd 100644
--- a/mscore/script/testscript.cpp
+++ b/mscore/script/testscript.cpp
@@ -17,10 +17,6 @@
 
 #include "libmscore/scorediff.h"
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-#define endl Qt::endl
-#endif
-
 namespace Ms {
 //---------------------------------------------------------
 //   TestScriptEntry::deserialize
@@ -84,20 +80,20 @@ bool ScoreTestScriptEntry::execute(ScriptContext& ctx) const
 {
     MasterScore* curScore = ctx.mscore()->currentScore()->masterScore();
     if (!curScore) {
-        ctx.execLog() << "ScoreTestScriptEntry: no current score" << endl;
+        ctx.execLog() << "ScoreTestScriptEntry: no current score" << Qt::endl;
         return false;
     }
 
     QString refFilePath = ctx.absoluteFilePath(_refPath);
     std::unique_ptr<MasterScore> refScore(ctx.mscore()->readScore(refFilePath));
     if (!refScore) {
-        ctx.execLog() << "reference score loaded with errors: " << refFilePath << endl;
+        ctx.execLog() << "reference score loaded with errors: " << refFilePath << Qt::endl;
         return false;
     }
 
     ScoreDiff diff(curScore, refScore.get(), /* textDiffOnly */ true);
     if (!diff.equal()) {
-        ctx.execLog() << "ScoreTestScriptEntry: fail\n" << diff.rawDiff() << endl;
+        ctx.execLog() << "ScoreTestScriptEntry: fail\n" << diff.rawDiff() << Qt::endl;
         return false;
     }
     return true;
diff --git a/mscore/shortcut.cpp b/mscore/shortcut.cpp
index 28b73a9c4ccb..3c7b48e5a6b3 100644
--- a/mscore/shortcut.cpp
+++ b/mscore/shortcut.cpp
@@ -4681,11 +4681,7 @@ QKeySequence Shortcut::keySeqFromString(const QString& str, QKeySequence::Sequen
         code[i] = 0;
     }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList strList = str.split(QRegularExpression("(?<!\\\\),|(?<=\\\\\\\\),"), Qt::SkipEmptyParts);
-#else
-    QStringList strList = str.split(QRegularExpression("(?<!\\\\),|(?<=\\\\\\\\),"), QString::SkipEmptyParts);
-#endif
     //split based on commas that are not preceded by a single slash; two is okay
     //original regex: (?<!\\),|(?<=\\\\),
 
diff --git a/mscore/svggenerator.cpp b/mscore/svggenerator.cpp
index d189a4a389d9..aa801f69f361 100644
--- a/mscore/svggenerator.cpp
+++ b/mscore/svggenerator.cpp
@@ -45,10 +45,6 @@
 #include "libmscore/imageStore.h"
 #include "libmscore/mscore.h"
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
-#define endl Qt::endl
-#endif
-
 ///////////////////////////////////////////////////////////////////////////////
 // FOR GRADIENT FUNCTIONALITY THAT IS NOT IMPLEMENTED (YET):
 //
@@ -397,7 +393,7 @@ class SvgPaintEngine : public QPaintEngine
 //
 //        str << QLatin1String("id=\"") << d_func()->generateGradientName() << QLatin1String("\">\n");
 //        saveGradientStops(str, g);
-//        str << QLatin1String("</linearGradient>") <<endl;
+//        str << QLatin1String("</linearGradient>") << Qt::endl;
 //    }
 //    void saveRadialGradientBrush(const QGradient *g)
 //    {
@@ -414,7 +410,7 @@ class SvgPaintEngine : public QPaintEngine
 //        }
 //        str << QLatin1String("xml:id=\"") <<d_func()->generateGradientName()<< QLatin1String("\">\n");
 //        saveGradientStops(str, g);
-//        str << QLatin1String("</radialGradient>") << endl;
+//        str << QLatin1String("</radialGradient>") << Qt::endl;
 //    }
 //    void saveConicalGradientBrush(const QGradient *)
 //    {
@@ -689,7 +685,7 @@ class SvgPaintEngine : public QPaintEngine
 //                       "font-size=\"" << d->attributes.font_size << "\" "
 //                       "font-weight=\"" << d->attributes.font_weight << "\" "
 //                       "font-style=\"" << d->attributes.font_style << "\" "
-//                    << endl;
+//                    << Qt::endl;
 //    }
 ///////////////////////////////////////////////////////////////////////////////
 };
@@ -1048,7 +1044,7 @@ bool SvgPaintEngine::begin(QPaintDevice*)
 
     // Stream the headers
     d->stream = new QTextStream(&d->header);
-    stream() << "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" << endl << SVG_BEGIN;
+    stream() << "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" << Qt::endl << SVG_BEGIN;
     if (d->viewBox.isValid()) {
         // viewBox has floating point values, size width/height is integer
         stream() << SVG_WIDTH << d->viewBox.width() << SVG_PX << SVG_QUOTE
@@ -1057,16 +1053,16 @@ bool SvgPaintEngine::begin(QPaintDevice*)
         stream() << SVG_VIEW_BOX << d->viewBox.left()
                  << SVG_SPACE << d->viewBox.top()
                  << SVG_SPACE << d->viewBox.width()
-                 << SVG_SPACE << d->viewBox.height() << SVG_QUOTE << endl;
+                 << SVG_SPACE << d->viewBox.height() << SVG_QUOTE << Qt::endl;
     }
     stream() << " xmlns=\"http://www.w3.org/2000/svg\""
                 " xmlns:xlink=\"http://www.w3.org/1999/xlink\""
-                " version=\"1.2\" baseProfile=\"tiny\">" << endl;
+                " version=\"1.2\" baseProfile=\"tiny\">" << Qt::endl;
     if (!d->attributes.title.isEmpty()) {
-        stream() << SVG_TITLE_BEGIN << d->attributes.title.toHtmlEscaped() << SVG_TITLE_END << endl;
+        stream() << SVG_TITLE_BEGIN << d->attributes.title.toHtmlEscaped() << SVG_TITLE_END << Qt::endl;
     }
     if (!d->attributes.description.isEmpty()) {
-        stream() << SVG_DESC_BEGIN << d->attributes.description.toHtmlEscaped() << SVG_DESC_END << endl;
+        stream() << SVG_DESC_BEGIN << d->attributes.description.toHtmlEscaped() << SVG_DESC_END << Qt::endl;
     }
 
 // <defs> is currently empty. It's necessary for gradients.
@@ -1097,7 +1093,7 @@ bool SvgPaintEngine::end()
     stream() << d->header;
 //    stream() << d->defs;
     stream() << d->body;
-    stream() << SVG_END << endl;
+    stream() << SVG_END << Qt::endl;
 
     delete d->stream;
     return true;
@@ -1157,7 +1153,7 @@ void SvgPaintEngine::writeImage(const QRectF& r, const QByteArray& imageData, co
              << SVG_PRESERVE_ASPECT << SVG_NONE << SVG_QUOTE;
 
     stream() << " xlink:href=\"data:" << mimeFormat << ";base64,"
-             << imageData.toBase64() << SVG_QUOTE << SVG_ELEMENT_END << endl;
+             << imageData.toBase64() << SVG_QUOTE << SVG_ELEMENT_END << Qt::endl;
 }
 
 void SvgPaintEngine::updateState(const QPaintEngineState& s)
@@ -1257,7 +1253,7 @@ void SvgPaintEngine::drawPath(const QPainterPath& p)
             stream() << SVG_SPACE;
         }
     }
-    stream() << SVG_QUOTE << SVG_ELEMENT_END << endl;
+    stream() << SVG_QUOTE << SVG_ELEMENT_END << Qt::endl;
 }
 
 void SvgPaintEngine::drawPolygon(const QPointF* points, int pointCount,
@@ -1280,7 +1276,7 @@ void SvgPaintEngine::drawPolygon(const QPointF* points, int pointCount,
                 stream() << SVG_SPACE;
             }
         }
-        stream() << SVG_QUOTE << SVG_ELEMENT_END << endl;
+        stream() << SVG_QUOTE << SVG_ELEMENT_END << Qt::endl;
     } else {
         path.closeSubpath();
         drawPath(path);
diff --git a/mu4/cloud/internal/cloudmanager.cpp b/mu4/cloud/internal/cloudmanager.cpp
index 19042b26ba5c..ec85b6f6ec6c 100644
--- a/mu4/cloud/internal/cloudmanager.cpp
+++ b/mu4/cloud/internal/cloudmanager.cpp
@@ -20,9 +20,7 @@
 #include <QWebEngineCookieStore>
 #endif
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
 #define qrand() QRandomGenerator::global()->generate()
-#endif
 
 namespace Ms {
 extern QString dataPath;
@@ -47,12 +45,10 @@ QString ApiInfo::apiInfoLocation()
 
 QByteArray ApiInfo::genClientId()
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
     QByteArray qtGeneratedId(QSysInfo::machineUniqueId());
     if (!qtGeneratedId.isEmpty()) {
         return qtGeneratedId;
     }
-#endif
     long long randId = qrand();
     constexpr size_t randBytes = sizeof(decltype(qrand()));
     qDebug() << "randBytes =" << randBytes << "sizeof(randId)" << sizeof(randId);
diff --git a/mu4/importexport/internal/guitarpro/importgtp-gp6.cpp b/mu4/importexport/internal/guitarpro/importgtp-gp6.cpp
index 249174ebac1f..c5714e1bd8ce 100644
--- a/mu4/importexport/internal/guitarpro/importgtp-gp6.cpp
+++ b/mu4/importexport/internal/guitarpro/importgtp-gp6.cpp
@@ -2378,11 +2378,7 @@ void GuitarPro6::readMasterBars(GPPartInfo* partInfo)
                         currentFermata = currentFermata.nextSibling();
 
                         // get the fermata information and construct a gpFermata from them
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
                         QStringList fermataComponents = fermata.split("/", Qt::SkipEmptyParts);
-#else
-                        QStringList fermataComponents = fermata.split("/", QString::SkipEmptyParts);
-#endif
                         GPFermata gpFermata;
                         gpFermata.index        = fermataComponents.at(0).toInt();
                         gpFermata.timeDivision = fermataComponents.at(1).toInt();
diff --git a/mu4/importexport/internal/guitarpro/importgtp.cpp b/mu4/importexport/internal/guitarpro/importgtp.cpp
index cdf8b0fff635..3ae8f7601bb1 100644
--- a/mu4/importexport/internal/guitarpro/importgtp.cpp
+++ b/mu4/importexport/internal/guitarpro/importgtp.cpp
@@ -877,13 +877,8 @@ void GuitarPro::readLyrics()
     QString lyrics = readWordPascalString();
     lyrics.replace(QRegExp("\n"), " ");
     lyrics.replace(QRegExp("\r"), " ");
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     auto sl = lyrics.split(" ", Qt::KeepEmptyParts);
     //gpLyrics.lyrics = lyrics.split(" ", Qt::KeepEmptyParts);
-#else
-    auto sl = lyrics.split(" ", QString::KeepEmptyParts);
-    //gpLyrics.lyrics = lyrics.split(" ", QString::KeepEmptyParts);
-#endif
     for (auto& str : sl) {
         /*while (str[0] == '-')
     {
diff --git a/mu4/importexport/internal/musedata/musedata.cpp b/mu4/importexport/internal/musedata/musedata.cpp
index d0c73ef6b1aa..d3a5a5c2cf7e 100644
--- a/mu4/importexport/internal/musedata/musedata.cpp
+++ b/mu4/importexport/internal/musedata/musedata.cpp
@@ -47,11 +47,7 @@ namespace Ms {
 
 void MuseData::musicalAttribute(QString s, Part* part)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList al = s.mid(3).split(" ", Qt::SkipEmptyParts);
-#else
-    QStringList al = s.mid(3).split(" ", QString::SkipEmptyParts);
-#endif
     foreach (QString item, al) {
         if (item.startsWith("K:")) {
             int key = item.mid(2).toInt();
diff --git a/mu4/importexport/internal/musicxml/importmxmlpass2.cpp b/mu4/importexport/internal/musicxml/importmxmlpass2.cpp
index afb5514947e1..639848fdb8f4 100644
--- a/mu4/importexport/internal/musicxml/importmxmlpass2.cpp
+++ b/mu4/importexport/internal/musicxml/importmxmlpass2.cpp
@@ -3398,11 +3398,7 @@ void MusicXMLParserPass2::doEnding(const QString& partId, Measure* measure,
         } else if (type.isEmpty()) {
             _logger->logError("empty ending type", &_e);
         } else {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
             QStringList sl = number.split(",", Qt::SkipEmptyParts);
-#else
-            QStringList sl = number.split(",", QString::SkipEmptyParts);
-#endif
             QList<int> iEndingNumbers;
             bool unsupported = false;
             foreach (const QString& s, sl) {
diff --git a/mu4/importexport/internal/ove/ove.cpp b/mu4/importexport/internal/ove/ove.cpp
index 2952af74efcb..e25db2eee0b3 100644
--- a/mu4/importexport/internal/ove/ove.cpp
+++ b/mu4/importexport/internal/ove/ove.cpp
@@ -3589,11 +3589,7 @@ QString NumericEnding::getText() const
 QList<int> NumericEnding::getNumbers() const
 {
     int i;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList strs = text_.split(",", Qt::SkipEmptyParts);
-#else
-    QStringList strs = text_.split(",", QString::SkipEmptyParts);
-#endif
     QList<int> endings;
 
     for (i = 0; i < strs.size(); ++i) {
@@ -9491,11 +9487,7 @@ void LyricChunkParse::processLyricInfo(const LyricInfo& info)
     bool changeMeasure = true;
     MeasureData* measureData = 0;
     int trackMeasureCount = ove_->getTrackBarCount();
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QStringList words = info.lyric_.split(" ", Qt::SkipEmptyParts);
-#else
-    QStringList words = info.lyric_.split(" ", QString::SkipEmptyParts);
-#endif
 
     while (index < words.size() && measureId + 1 < trackMeasureCount) {
         if (changeMeasure) {
diff --git a/mu4/instruments/view/instrumentlistmodel.cpp b/mu4/instruments/view/instrumentlistmodel.cpp
index 85ea9641585d..39604cfb28af 100644
--- a/mu4/instruments/view/instrumentlistmodel.cpp
+++ b/mu4/instruments/view/instrumentlistmodel.cpp
@@ -204,11 +204,7 @@ void InstrumentListModel::unselectInstrument(const QString& id)
 
 void InstrumentListModel::swapSelectedInstruments(int firstIndex, int secondIndex)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
     m_selectedInstruments.swapItemsAt(firstIndex, secondIndex);
-#else
-    m_selectedInstruments.swap(firstIndex, secondIndex);
-#endif
     emit selectedInstrumentsChanged();
 }
 
diff --git a/mu4/palette/internal/palette/paletteworkspace.cpp b/mu4/palette/internal/palette/paletteworkspace.cpp
index b74d5f385aad..233bb8e166f0 100644
--- a/mu4/palette/internal/palette/paletteworkspace.cpp
+++ b/mu4/palette/internal/palette/paletteworkspace.cpp
@@ -1088,22 +1088,4 @@ bool PaletteWorkspace::read(XmlReader& e)
 
     return true;
 }
-
-//---------------------------------------------------------
-//   PaletteWorkspace::needsItemDestructionAccessibilityWorkaround
-///   Checks whether workaround for palette search crash
-///   with NVDA is needed, see issue #298899.
-//---------------------------------------------------------
-
-bool PaletteWorkspace::needsItemDestructionAccessibilityWorkaround() const
-{
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
-    // Qt switched to a new accessibility backend since 5.11
-    // and no crashes are reported for 5.12 so presumably
-    // the workaround is not needed since Qt 5.11.
-    return false;
-#else
-    return QAccessible::isActive();
-#endif
-}
 } // namespace Ms
diff --git a/mu4/palette/internal/palette/paletteworkspace.h b/mu4/palette/internal/palette/paletteworkspace.h
index 64eda7d1b257..d90e19db71e0 100644
--- a/mu4/palette/internal/palette/paletteworkspace.h
+++ b/mu4/palette/internal/palette/paletteworkspace.h
@@ -250,8 +250,6 @@ class PaletteWorkspace : public QObject
     Q_INVOKABLE bool savePalette(const QModelIndex&);
     Q_INVOKABLE bool loadPalette(const QModelIndex&);
 
-    Q_INVOKABLE bool needsItemDestructionAccessibilityWorkaround() const;
-
     bool paletteChanged() const { return userPalette->paletteTreeChanged(); }
 
     void setUserPaletteTree(std::unique_ptr<PaletteTree> tree);
diff --git a/mu4/palette/qml/MuseScore/Palette/PaletteTree.qml b/mu4/palette/qml/MuseScore/Palette/PaletteTree.qml
index 692b602cefd8..1c2530c937b4 100644
--- a/mu4/palette/qml/MuseScore/Palette/PaletteTree.qml
+++ b/mu4/palette/qml/MuseScore/Palette/PaletteTree.qml
@@ -350,8 +350,7 @@ ListView {
             property var modelIndex: paletteTree.model.modelIndex(index, 0)
 
             Component.onDestruction: {
-                if (paletteTree.paletteWorkspace.needsItemDestructionAccessibilityWorkaround())
-                    Utils.setInvisibleRecursive(this);
+                Utils.setInvisibleRecursive(this);
             }
 
             onActiveFocusChanged: {
@@ -700,8 +699,7 @@ ListView {
                     paletteEditingEnabled: model.editable
 
                     Component.onDestruction: {
-                        if (paletteTree.paletteWorkspace.needsItemDestructionAccessibilityWorkaround())
-                            Utils.setInvisibleRecursive(this);
+                        Utils.setInvisibleRecursive(this);
                     }
 
                     onVisibleChanged: {
diff --git a/mu4/plugins/api/qmlpluginapi.cpp b/mu4/plugins/api/qmlpluginapi.cpp
index 2854534736b0..9bbc1aa20997 100644
--- a/mu4/plugins/api/qmlpluginapi.cpp
+++ b/mu4/plugins/api/qmlpluginapi.cpp
@@ -344,7 +344,6 @@ void PluginAPI::registerQmlTypes()
     qmlRegisterType<ScoreView>("MuseScore", 3, 0, "ScoreView");
 
     qmlRegisterType<Cursor>("MuseScore", 3, 0, "Cursor");
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     qmlRegisterAnonymousType<ScoreElement>("MuseScore", 3);
     qmlRegisterAnonymousType<Score>("MuseScore", 3);
     qmlRegisterAnonymousType<Element>("MuseScore", 3);
@@ -360,23 +359,6 @@ void PluginAPI::registerQmlTypes()
     //qmlRegisterAnonymousType<Stem>("MuseScore", 3);
     //qmlRegisterAnonymousType<StemSlash>("MuseScore", 3);
     //qmlRegisterAnonymousType<Beam>("MuseScore", 3);
-#else
-    qmlRegisterType<ScoreElement>();
-    qmlRegisterType<Score>();
-    qmlRegisterType<Element>();
-    qmlRegisterType<Chord>();
-    qmlRegisterType<Note>();
-    qmlRegisterType<Segment>();
-    qmlRegisterType<Measure>();
-    qmlRegisterType<Part>();
-    qmlRegisterType<Excerpt>();
-    qmlRegisterType<Selection>();
-    qmlRegisterType<Tie>();
-    //qmlRegisterType<Hook>();
-    //qmlRegisterType<Stem>();
-    //qmlRegisterType<StemSlash>();
-    //qmlRegisterType<Beam>();
-#endif
     qmlRegisterType<PlayEvent>("MuseScore", 3, 0, "PlayEvent");
 
 #if 0
@@ -408,11 +390,7 @@ void PluginAPI::registerQmlTypes()
     qmlRegisterType<SlurTie>();
     qmlRegisterType<Spanner>();
 #endif
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     qmlRegisterAnonymousType<FractionWrapper>("MuseScore", 3);
-#else
-    qmlRegisterType<FractionWrapper>();
-#endif
     qRegisterMetaType<FractionWrapper*>("FractionWrapper*");
 
     qmlTypesRegistered = true;
diff --git a/mu4/plugins/api/util.h b/mu4/plugins/api/util.h
index 5a76ff0e0efa..435a3c0d4ecd 100644
--- a/mu4/plugins/api/util.h
+++ b/mu4/plugins/api/util.h
@@ -123,11 +123,7 @@ class MsProcess : public QProcess
 
 public slots:
     //@ --
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) //???
     Q_INVOKABLE void start(const QString& program) { QProcess::start(program, {}, ReadWrite); }
-#else
-    Q_INVOKABLE void start(const QString& program) { QProcess::start(program); }
-#endif
     //@ --
     Q_INVOKABLE bool waitForFinished(int msecs = 30000) { return QProcess::waitForFinished(msecs); }
     //@ --
diff --git a/mu4/plugins/view/pluginsmodel.cpp b/mu4/plugins/view/pluginsmodel.cpp
index 753e26d3051c..2a79a772c583 100644
--- a/mu4/plugins/view/pluginsmodel.cpp
+++ b/mu4/plugins/view/pluginsmodel.cpp
@@ -176,11 +176,7 @@ QStringList PluginsModel::categories() const
         result << plugin.category;
     }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) // ??
     return result.values();
-#else
-    return result.toList();
-#endif
 }
 
 void PluginsModel::updatePlugin(const PluginInfo& plugin)
diff --git a/mu4/userscores/view/templatesmodel.cpp b/mu4/userscores/view/templatesmodel.cpp
index cd6d865ee5d8..aca1c9b1e89c 100644
--- a/mu4/userscores/view/templatesmodel.cpp
+++ b/mu4/userscores/view/templatesmodel.cpp
@@ -31,11 +31,7 @@ void TemplatesModel::load()
 
 QStringList TemplatesModel::categoriesTitles() const
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) // ??
     return m_visibleCategoriesTitles.values();
-#else
-    return m_visibleCategoriesTitles.toList();
-#endif
 }
 
 QString TemplatesModel::currentTemplatePath() const
diff --git a/thirdparty/google_analytics/ganalytics.cpp b/thirdparty/google_analytics/ganalytics.cpp
index 7037eb083696..18ee637816d0 100644
--- a/thirdparty/google_analytics/ganalytics.cpp
+++ b/thirdparty/google_analytics/ganalytics.cpp
@@ -247,11 +247,18 @@ QString GAnalytics::Private::getSystemInfo()
     case QSysInfo::MV_10_11:
         os = "Macintosh; Mac OS 10.11";
         break;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 8, 0))
     case QSysInfo::MV_10_12:
         os = "Macintosh; Mac OS 10.12";
         break;
-#endif
+    case QSysInfo::MV_10_13:
+        os = "Macintosh; Mac OS 10.13";
+        break;
+    case QSysInfo::MV_10_14:
+        os = "Macintosh; Mac OS 10.14";
+        break;
+    case QSysInfo::MV_10_15:
+        os = "Macintosh; Mac OS 10.15";
+        break;
     case QSysInfo::MV_Unknown:
         os = "Macintosh; Mac OS unknown";
         break;
@@ -291,7 +298,6 @@ QString GAnalytics::Private::getSystemInfo()
     case QSysInfo::MV_IOS_9_0:
         os = "iPhone; iOS 9.0";
         break;
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 8, 0))
     case QSysInfo::MV_IOS_9_1:
         os = "iPhone; iOS 9.1";
         break;
@@ -304,7 +310,6 @@ QString GAnalytics::Private::getSystemInfo()
     case QSysInfo::MV_IOS_10_0:
         os = "iPhone; iOS 10.0";
         break;
-#endif
     case QSysInfo::MV_IOS:
         os = "iPhone; iOS unknown";
         break;
diff --git a/thirdparty/singleapp/src/qtlocalpeer.cpp b/thirdparty/singleapp/src/qtlocalpeer.cpp
index 332b0643f14f..1c463f7c57d6 100644
--- a/thirdparty/singleapp/src/qtlocalpeer.cpp
+++ b/thirdparty/singleapp/src/qtlocalpeer.cpp
@@ -118,7 +118,7 @@ bool QtLocalPeer::isClient()
         return true;
 
     bool res = server->listen(socketName);
-#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
+#if defined(Q_OS_UNIX)
     // ### Workaround
     if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
         QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);