This issue is fixed in the 31 January 2023 patch 126.96.36.1990
Since updating to macOS Ventura, users with Intel equipped Macs are no longer able to quit their game. The only way to close it is to select Force Quit from the Apple menu. If this is happening to you NEVER choose Save & Exit as you risk corrupting your save. Instead select Save from the in-game menu then click Exit Game. Now choose Force Quit from the Apple menu and select The Sims 4 then confirm you want to force quit. This will close the game.
There may be a risk of corrupting your install by closing the game this way but it shouldn’t affect your saves. A repair in Origin should fix any corrupted game files.
This is not affecting players on Apple Silicon Macs. If you are experiencing a quitting issue with the game it is for a different reason.
EA are aware of this bug. There is an active thread at Answers HQ here – https://answers.ea.com/t5/Technical-Issues-Mac/-CURRENT-ISSUE-Upgraded-to-macOS-Ventura-can-only-Force-Quit/td-p/11995841