Sims 3 through EA 64-bit version missing or not working?

raeynbow​  Are you using iCloud Drive and syncing the contents of Documents?  To check, open System Settings > Apple ID, and if iCloud Drive is checked off, click Options.  Desktop & Documents will be at the top of the list.

If you are syncing your documents but don't want to stop, create a new admin user account on your Mac and don't link it to your Apple ID.  Open the EA App in that account, repair the game (Sims 3 > Manage > Repair), and it's important to do this in the new account, then try to play.

If you use a third-party antivirus, please disable it before creating the new account, and don't reenable it until after you've tested the game.  As long as you don't do anything else during this time, your computer should be safe, and you can reenable the AV once you have your results.

The service initialization error is often permissions-related, as in, the game can't access the user folder in Documents.  That's not the only cause but the most common one, especially in macOS.

This is what happens when i click play 

Hi thanks so much for responding! I have tried both methods as well as uninstalling and reinstalling everything. This is what it says now. My storage info is pictured too! 

raeynbow​  You clearly have the 64-bit version of Sims 3 installed since the game starts at all.  The 32-bit version wouldn't even install, in fact, since the installer is also 32-bit.  Ignore the system requirements, which haven't been updated in a while.

Instead, please restart your computer, open absolutely nothing except for the EA App, and plug in your laptop before trying to play.  If the game still won't run, repeat the process, except this time, sign into the EA App, put it in offline mode, and disable wifi before pressing Play.

If that doesn't help either, please let me know how much free and total storage is available on your Mac.