You won't believe it. Even with SheepShaver Prefs the programme is unexpectedly closed down.
What do you mean with "with
SheepShaverPrefs"? Does SheepShaverPrefs quit unexpectedly? Or do you run the two applications together? Or do you mean that SheepShaver still crashes (that is what "unexpectedly quit" usually is) after you used SheepShaverPrefs to change the settings as I suggested?
I understand that SheepShaver did run, that you set it up and installed the system and that it booted and ran fine from the installed system at first. Is that correct?
The rom file is still in the SheepShaver folder, the file is still named "Mac OS ROM", and the ROM File entry in the prefs still reads "Mac OS ROM"? Is that correct?
The problem only started after you added the disk images of the floppy disks to the volumes list in preferences. Correct?
Have you tried to return to the previously working setup by removing those added disk images from the volumes list, leaving only the startup volume in the list? (You can use SheepShaverPrefs to do that.)
If nothing works, please post here:
1. The contents of the invisible prefs file.
When you type in Terminal at the prompt:
and hit enter, the prefs file will open in TextEdit and you can copy its content and paste it here.
(the Terminal application is in /Applications/Utilities/)
2. Messages in Console log when you try to launch SheepShaver.
First open Console (in /Applications/Utilities/) and then launch SheepShaver. Copy the messages that appear and paste them here.