Re: Sims 4 will open, but then quits by itself (Mac)
@christinstone18 Try running the Origin reset tool for macs, and then disabling Origin in-game.
https://help.ea.com/en-us/help/origin/origin/how-to-reset-origin-on-mac/
If that doesn't help, try dragging your entire TS4 game folder out of Documents and onto your desktop. When you launch the game again, if it launches, a clean folder will spawn with no content. If you can load and play a new save in this folder, you can start moving your content into it from your old folder. Keep in mind that you may have downloaded some bad or out of date cc, or you might have content that's incompatible with the recent update, so you should test out your cc in batches. When you confirm that one batch works in-game, you can set it aside and test the next batch. Any batch that doesn't work will have to be split and retested until you've found the problem item(s).
If you can't get TS4 to launch even with a clean folder, please post back here and list your mac's specs as described in this post: