A while back I tried to update my Mac Pro with a 1 TB drive. I ran into lots of issues and finally had to go back to my old stock SSD. I’ve recently decided to get another SSD and bring my system back up to 1 TB. It’s tougher to get an off the shelf unit because of the proprietary connector Apple used. So I went with OWC (Macsales.com). It’s installed and will be testing things out. It is faster according to testings (Blackmagic’s Disk Tester) but I won’t know until I really start doing things if I see any real world speed increases.