Keep QGIS Browser alias on Mac from duplicating

images/icons/mac/browser/CMakeLists.txt

@@ -2,5 +2,9 @@
 FILE (GLOB ICONS *.icns)
 INSTALL (FILES ${ICONS}
          DESTINATION "${CMAKE_INSTALL_PREFIX}/${QGIS_BIN_DIR}/QGIS Browser.app/Contents/Resources")
-# create alias now, so alias file gets correct icon
+# create alias now, so alias file gets correct icon, delete first if it exists
+SET (BROWSER_ALIAS "$ENV{DESTDIR}${QGIS_INSTALL_PREFIX}/QGIS Browser.app")
+IF (EXISTS ${BROWSER_ALIAS})
+    FILE (REMOVE ${BROWSER_ALIAS})
+ENDIF ()
 INSTALL (CODE "EXECUTE_PROCESS(COMMAND osascript -e \"tell application \\\"Finder\\\" to make alias file to POSIX file \\\"$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/${QGIS_BIN_DIR}/QGIS Browser.app\\\" at POSIX file \\\"$ENV{DESTDIR}${QGIS_INSTALL_PREFIX}/\\\"\")")