AshlynGiorsetti Please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.
mandaxface Crashing on a Mac (while playing with no mods or custom content) should be reported in the Mac tech forum:
The Sims 4 Technical Issues - Mac | EA Forums
The issues with completing events are separate, so it would be best to post in existing threads in the Gameplay forum:
The Sims 4 Gameplay Questions & Issues | EA Forums
Filter by the "time limited events" tag to see relevant threads, and post in whichever ones best represent the issues you're seeing.