LadyAriancia I'm glad to hear your new computer is working out. You can ignore the unrecognized video card error, as it only affects the default graphics settings the game chooses, and you can change the settings regardless. The game's database hasn't been updated in a while, so newer cards are missing.
murryshinoda If you still need help, please post in the Mac tech section:
The Sims 4 Technical Issues - Mac | EA Forums
List the full specs of your Mac: everything under About This Mac including the OS and except for the serial number. And test with your Mods folder removed.
