Re: sims 3 64- bit on macbook pro keeps freezing + black screen

@Honey6330  Please disable iCloud's syncing of Documents entirely.  First, make a backup of anything in Documents you don't want to lose, just in case—you should still be able to find it within your iCloud drive, but it's better not to rely on that.  Then follow this guide:

https://bluebellflora.com/2017/02/06/sims-3-and-sims-4-not-loading-save-games/

Restart your computer and try to play again.  If you see the same issue, please go into Documents > Electronic Arts and move the Sims 3 folder to the desktop, then try again.