diff --git a/build_legacy.sh b/build_legacy.sh
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--- /dev/null
+++ b/build_legacy.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+rm -rf build dist dist_dmg
+python3 buildPy2app.py py2app
+mkdir dist_dmg
+cp resources/macOS_legacy_readme.pdf resources/.macOS_readme.pdf
+export VER="$(cat syncplay/__init__.py | awk '/version/ {gsub("\047", "", $3); print $NF}')"
+dmgbuild -s appdmg.py "Syncplay" dist_dmg/Syncplay_${VER}_macOS_legacy.dmg
diff --git a/resources/macOS_legacy_readme.pdf b/resources/macOS_legacy_readme.pdf
new file mode 100644
index 0000000..7d13304
Binary files /dev/null and b/resources/macOS_legacy_readme.pdf differ