AND you don't have to pay extra for the Mac version of the game you already own on the PC :-D

This is in the shadowstorage folder, I was missing around 125GB: 1. Run Command Prompt as Admininstrator 2. Type: vssadmin list shadowstorage You'll get something like this: Used Shadow Copy Storage space: 19.594 GB Allocated Shadow Copy Storage space: 21.637 GB Maximum Shadow Copy Storage space: 25 GB 3. Execute this command to lower it to 5GB: (Or whatever you want) vssadmin resize shadowstorage /On=C: /For=C: /Maxsize=5GB