Mac: Error with sims 3 "Unknown Error Occurred" (after installing).

@simican

Please try one or all of the following troubleshooting steps:

1. Open Documents > Electronic Arts and drag the Sims 3 folder to your desktop. Relaunch the game, create a Sim, move to a house and play for a good 20 minutes or so if you can. Is it now working?
2. Play in windowed mode - when the game launches in full screen hold down CMD and press the Return/Enter key.
3. Purging RAM before you launch the game and frequently during gameplay.
4. If you have a post-2013 model Mac check whether it is listed in this thread and follow the workaround if necessary - http://answers.ea.com/t5/The-Sims-Mac/CURRENT-ISSUE-The-Sims-3-Issues-playing-on-newer-post-2013-Macs/m-p/4935394#U4935394
5. If you have recently uninstalled and re-installed the game did you make sure to get rid of every single file from the previous install? Just using the uninstaller is not enough.
6. If none of the above work please reply with the full specification of your Mac. If you do not know how to find this follow the instructions here - http://answers.ea.com/t5/The-Sims-Mac/READ-FIRST-Sims-3-Mac-Help-Guides-and-Troubleshooting/m-p/4756624/highlight/true#M4 Providing all the information about your Mac and game is essential. Just stating what operating system you're using or what year your Mac is doesn't help at all.