I mean 10.16, if that’s Monterey. I can’t keep track. I can make releases for 10.15 (Catalina) myself as a registered developer. They appear to run on 10.15 only. The updates I’m releasing now are for 10.9, and I can’t code sign them because apple prevents it for these old os’s.
If you can run games under 10.16 and they are open-source then please let me know. That may be a lead for me.