Hi, I have just installed SheepShaver and Mac OS 9.0.4, it was so great to play a game that I used to play 20 years ago!!
I have tried to play other games but had most of the time the same issue: a message box 'The application program "Lemmings" could not be opened, because an error of type -39 occurred.'
I have tried to set the screen to gray (or to 256 colors only) and restart but it didn't do the trick.
The application that worked was https://www.macintoshrepository.org/3509-step-on-it-
Applications that didn't work: glypha, lemmings, wolfenstein
Any idea what to try?