The Sims Medieval itself was never updated to 64-bit. The last official Mac version (from Aspyr, around 2011) is 32-bit, so it won’t run on macOS Catalina or later (10.15+) without workarounds.
The game crashes less in a Windows VM on an M2 Mac than it ever did natively on my old Intel Mac running 32-bit. The Mac version always had a weird memory leak in the ‘Pit of Judgement’ cutscene. Now, running the Windows version via CrossOver? Rock solid at 1440p. sims medieval mac 64 bit
Here’s an interesting take on The Sims Medieval for Mac (64-bit), focusing on why it still gets attention despite its age and technical hurdles. The Sims Medieval itself was never updated to 64-bit