diff --git a/.gitignore b/.gitignore
index 5251d99..2b34a74 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+overdrive-libby-plugin-v*.zip
 calibre-plugin/commit.txt
 
 .env
diff --git a/bump_version.py b/bump_version.py
new file mode 100644
index 0000000..77a2efb
--- /dev/null
+++ b/bump_version.py
@@ -0,0 +1,64 @@
+# Replaces old version number for the new one
+import argparse
+import re
+from pathlib import Path
+
+version_sub_re = re.compile(r"__version__ = \(\d+, \d+, \d+\)")
+version_re = re.compile(r"\d+\.\d+\.\d+")
+
+
+def version_num(value: str):
+    if not version_re.match(value):
+        raise argparse.ArgumentTypeError(
+            f'"{value}" is an invalid version number format'
+        )
+    return value
+
+
+def run(src_file: str, new_version: str):
+    temp_path = Path(f"{src_file}.temp")
+    src_path = Path(src_file)
+    with src_path.open("r", encoding="utf-8") as f_in, temp_path.open(
+        "w", encoding="utf-8"
+    ) as f_out:
+        while True:
+            line = f_in.readline()
+            if not line:
+                break
+            mobj = version_sub_re.search(line)
+            if not mobj:
+                f_out.write(line)
+                continue
+            version_tuple = new_version.split(".")
+            new_line = version_sub_re.sub(
+                f'__version__ = ({", ".join(version_tuple)})',
+                line,
+            )
+            print(
+                f"{src_file}:\n"
+                f"* before:\t{line.strip()}"
+                f"\n* after:\t{new_line.strip()}"
+            )
+            f_out.write(new_line)
+    temp_path.rename(src_file)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Bump version")
+    parser.add_argument(
+        "new_version", type=version_num, help="New version number. Format d.d.d"
+    )
+
+    args = parser.parse_args()
+    src_files = ("calibre-plugin/__init__.py",)
+    for src in src_files:
+        run(src, args.new_version)
+
+    print(f'\nROLLBACK git commands:\ngit restore {" ".join(src_files)}\n')
+
+    print(
+        f'COMMIT git commands:\ngit add -u {" ".join(src_files)} calibre-plugin/translations/ translate.sh'
+    )
+    print(f"git commit -m 'Bump version to {args.new_version}'")
+    print(f"git tag --sign -a 'v{args.new_version}' -m 'Release v{args.new_version}'")
+    print("git push && git push --tags\n")
diff --git a/bump_version.sh b/bump_version.sh
new file mode 100644
index 0000000..62d3e2a
--- /dev/null
+++ b/bump_version.sh
@@ -0,0 +1,12 @@
+# Helper bash script to update versions and prompt for commands to run - macOS
+# Does not commit to git because we usually have to also update screenshots, readme, changelog, etc
+if [[ -z "$1" ]]; then
+  echo "Please specify a version number, e.g. 0.1.2"
+  exit
+fi
+
+version="$1"
+
+python3 bump_version.py "$version" && \
+sed -i '' -e "s/'[0-9]*\.[0-9]*\.[0-9]*'/'${version}'/g" translate.sh && \
+sh translate.sh "$version"
diff --git a/debug.sh b/debug.sh
new file mode 100644
index 0000000..a87a10a
--- /dev/null
+++ b/debug.sh
@@ -0,0 +1,8 @@
+# Helper bash script to start calibre debug with the latest plugin code loaded - macOS
+for f in calibre-plugin/translations/*.po
+do
+  echo "Building ${f%\.po} into ${f%\.po}.mo"
+  msgfmt -o "${f%\.po}.mo" "${f%\.po}"
+done
+echo "$(git rev-parse HEAD)" > calibre-plugin/commit.txt
+calibre-debug -s; calibre-customize -b calibre-plugin; CALIBRE_OVERRIDE_LANG=en calibre-debug -g
diff --git a/local_bundle.sh b/local_bundle.sh
new file mode 100644
index 0000000..5c25285
--- /dev/null
+++ b/local_bundle.sh
@@ -0,0 +1,7 @@
+# Helper bash script to bundle a dev zip for local testing - macOS
+version="$(git rev-parse HEAD)"
+rm -f overdrive-libby-plugin-v*.zip
+echo "$(git rev-parse HEAD)" > calibre-plugin/commit.txt
+cd calibre-plugin && \
+zip --quiet -r ../"overdrive-libby-plugin-v${version::7}.$(date +%H%M%S).zip" ./* && \
+cd ..
diff --git a/translate.sh b/translate.sh
index 220c142..94fd27e 100644
--- a/translate.sh
+++ b/translate.sh
@@ -1,3 +1,4 @@
+# Helper bash script to update and build translations files - macOS
 if [[ -z "$1" ]]; then
   version='0.1.8'
 else