May 2016
May 2016
Is your Mac one of the ones listed in this thread - http://answers.ea.com/t5/The-Sims-Mac/CURRENT-ISSUE-The-Sims-3-Issues-playing-on-newer-post-2013-Mac...
If so, please follow the links to edit your graphics files. If not, what model Mac do you have?
May 2016
It did not work
May 2016
There's no guarantee that it will unfortunately. It quite often works with the base game but then adding in certain EPs can break it again. It appears that Macs with Broadwell processors are especially affected.
May 2016
You can use Activity Monitor to quit the processes but it will probably keep happening every time you try and load the game - https://bluebellflora.com/cannot-start-the-process-when-the-game-is-running-sims-3-error-on-mac/