Unknown error occurred

For this you will need to contact Origin/EA support they will gladly help you whit this problem  https://help.ea.com/en/origin go here press contact as give information press I still need help at the bottom of the page and then press start live chat and you will get a live chat whit an EA agent that will be glad to help you 

if this helps pleas give XP to my account thanks

mark this as solution if it solves your question so others will know the answer when they come here 

@xxxo77o4906: No, this is a common mac issue not an issue of Customer Support,

@lschmitz14: I'll forward this to our mac helper.

Hi,

It sounds as though you've tried a couple of downloads and installations. I would recommend doing a clean uninstall and then start from fresh.

When you uninstall TS3 games on your Mac using the uninstaller, the game leaves behind stray files and isn't completely removed from your computer. These files may conflict with future installations. It is best to completely remove them. BluebellFlora's website provides a guide on how to do this:

http://bluebellflora.com/the-sims-3-on-a-mac/how-to-do-a-clean-uninstall-and-reinstall-on-a-mac/

After cleanly uninstalling, install the base game and patch it up to date. If you cannot update via the Launcher, download and apply the latest cumulative manual patch (called the superpatch) for Mac.

Check that your game works properly at this point. Then install any EPs and SPs that you own, in order of release date.

Since you are using Origin, remove that as well and redownload it. The latest version can be downloaded from here: http://www.dm.origin.com/mac/download

Additional advice on how to download games (thank you Tremayne for this tip):
When downloading from Origin, do NOT use the first install icon. Move your cursor over the game cover and click on the information (letter i) and then click on the install button from there.

For some reason, downloads from Origin frequently become corrupted. Using the i reduces the chance of your download being corrupted. If you have already been unfortunate and have a corrupted download, then it is important to remove all traces of this before trying again, by doing a thorough, clean uninstallation first.

Good luck!

Caspin