Re: EA App causing new problems with TS3 CC [mac]
@smythesbooms For the issue installing content through the launcher, please see the first post of this thread:
For the game itself, please move the entire Sims 3 folder out of Documents > Electronic Arts and onto your desktop, then see whether you can play. When you open the launcher, a clean folder will spawn with no content; don't add anything to it yet. Your saves and other content will be intact in the folder you moved and can be restored later, but please leave those files where they are for now.
Sims 3 absolutely does run on 64-bit-only Macs. I don't know why the product page says what it does, but it's incorrect and not the cause of your issues.