I have launched upbge on my iMac with the Terminal app to check for errors. The app simply crashed and this popped up in the Terminal:
Last Login: Thu Jan 13 23:16:10 on console
/Volumes/username/UPBGE/bin/blender.app/Contents/MacOS/blender ; exit;
So now I know part of the problem to why I can’t get into UPBGE on my Mac despite 2.79 being perfectly compatible with OS X 10.6.8 meaning I don’t need to upgrade the computer OS.
I just need to get around this illegal instruction to get the UPBGE app to work. I hear UPBGE has so many improvements, and it’s worth a shot, as the ripping out of Blenders internal GE from 2.8 was a major turnoff for me, as I love games, especially creating my own personal ones.