I have never had any problems with menu->Quit in Ted2 so I have no idea what’s up there.
To be absolutely clear: You are selecting Quit from the Ted2 file menu and nothing happens?
I mainly added Cmd-Q so that users can quit their own apps in fullscreen (it can be tricky otherwise on Mac) but the latest change shouldn’t really affect Ted2 behaviour, which here at least has never been broken.
You could try adding a DebugStop() to fileactions->OnQuit to see if it gets that far or if something else is eating the Cmd-Q key.
Anyone else having problems with File->Quit on the Mac?
What version MacOS are you on?