diff --git a/pyinstaller/macos/README.md b/pyinstaller/macos/README.md
new file mode 100644
index 0000000..8846601
--- /dev/null
+++ b/pyinstaller/macos/README.md
@@ -0,0 +1,11 @@
+# Build on MacOS
+
+First run
+
+    bash pyinstaller/macos/build-app.sh
+
+to generate `dtool-lookup-gui.app`, then run
+
+    bash pyinstaller/macos/build-dmg.sh
+
+to bundle DMG `dtool-lookup-gui-macos.dmg`.
diff --git a/pyinstaller/macos/build-app.sh b/pyinstaller/macos/build-app.sh
index 0c66897..1cb080d 100644
--- a/pyinstaller/macos/build-app.sh
+++ b/pyinstaller/macos/build-app.sh
@@ -24,5 +24,3 @@ cd dtool_lookup_gui && glib-compile-schemas . && cd ..
 pyinstaller -y ./pyinstaller/macos/dtool-lookup-gui-macos.spec 2>&1 | tee pyinstaller.log
 
 mv dist/dtool-lookup-gui.app dtool-lookup-gui.app
-
-bash -c "tar -cvf dtool-lookup-gui-macos.tar $(cat pyinstaller/MANIFEST.macos | xargs)"