Attachment C:\fakepath\BA Crash on Exit.txt not found
I'll have to take a look at the crash report again to see what might be the culprit here. But it's managed to happen in every one of your emulators that I've used. It's a crash that literally happens at the tail end of the exit process, as file writes (SRAM, etc) are performed properly even with the crash.
Edit: Here's the crash. All I did with that session was open the app, dismiss both the recently played and Open windows, and then look at the preferences (CMD-,) while typing my response to one of your other threads. If you find something in the attached file that points to something I can potentially change on my side, I'll gladly take the time to do so and see if it eliminates the crash on exit. This only started happening with 10.12.x and was fine up until 10.11.6 (I skipped Yoshitme because it was just a horrible version of the OS and buggy beyond words, especially with regard to Apple pulling mDNSResponder out and replacing it with discoveryD until users vociferously complained about its instability).
Edit 2: Looks like Macscene's attachment functionality is broken, at least with OS X, as you can see by the first line in this post. So here's a pastebin
of the crash.