First launch on macOS (app is not notarized):
1. Open the .dmg and drag the app to Applications.
2. Double-click the app once — macOS will block it.
3. System Settings -> Privacy & Security -> scroll down -> "Open Anyway".
If macOS calls the app "damaged" instead, clear the download
quarantine flag and try again:
  xattr -cr "/Applications/Claude Session Manager.app"
Only the FIRST install needs this. Updates after that are downloaded by
the app itself, which does not set the quarantine flag, so they install
without any prompt.