Exiting the simple example leaves SBCL "exec" app open in Mac tray.

[collinalexbell]

This is the result of running and closing 3 GTK apps. The exec program remains in the mac tray even after closing the GTK app. If I force quit from the tray, it kills my inferior-lisp.

[bohonghuang]

Can you elaborate on how you launched and quit the GTK application? I guess it is an issue related to GTK4 itself.

[bohonghuang]

If you quit the application and get the input prompt in REPL, which means the thread terminates normally, I'm afraid it cannot be easily solved in Lisp. It should not be a problem in your application distribution since the Lisp session will quit with the main thread, and no icon will remain in the tray.