Re: sims 3 64 bit & metal keeps crashing?

@tianasarah2003  Before you do anything else, please delete everything in CurrentGame, inside Documents > Electronic Arts > The Sims 3.  That folder should always be empty unless you're actually playing, but sometimes the files inside don't get deleted when the game crashes.  Please also delete the five cache files in the same Sims 3 folder; these should be deleted regularly anyway, and every time you quit while you're troubleshooting.  For reference:

• CASPartCache.package
• compositorCache.package
• scriptCache.package
• simCompositorCache.package
• socialCache.package

Try playing while your computer is offline.  You can sign into Origin and put it in offline mode, then disable wifi and/or unplug the ethernet cable.

If that doesn't help, try turning lighting down to the minimum setting; it's helped a few other people with your graphics chip.  It may also help to play in windowed mode.

If these steps don't make a difference, please start a new save and see how it runs.  I'm not saying you need to abandon your current save, just that it's a useful test of whether the issue is the save itself or something else on your computer.  You can just start the game clock and let the sims go about their business, then see whether the game crashes again.

Whenever your game does crash, please touch the bottom of the Mac and the section between the keyboard and screen to see how hot it is.  Excess heat can cause crashes even without any other issues.