Sims 4 won't launch with mods anymore (Mac)

@dovviie  It's highly likely that one or more of your mods is incompatible with the latest patch, and you need to download a new version or get rid of the mod entirely.  Unfortunately, there's no way to know which mods are affected, other than to test them.  But you can try them out in batches—if one batch works, put it aside and try the next one; any batch that doesn't work gets split and retested until you've found the culprit.  You might want to save yourself some time by just downloading the newest versions of your various non-cc mods and test them out together, then go through the rest of the files afterwards.

It's also a good idea to run these tests in a clean game folder so that you're not messing with your existing saves.  If you pull your entire TS4 folder out of Documents and onto your desktop, a new folder will spawn the next time you launch the game.  Then you can move batches of mods and cc into this folder, test them, and put them aside when you're satisfied, all without loading any of your saves or clogging up your existing game folder with extraneous cache file data.