Harmony 12 Full Scene Antialiasing Crashing Issues

Whenever I enable full scene antialiasing, no matter what number of samples I enter, Harmony always crashes during playback. Has anyone found a workaround for this? I used to use version 10 before & I never had this issue. I’m using Harmony Premium version 12.2.1 and an iMac with OSX 10.11.5 with 16 GB of ram.

Full screen antialiasing is the video card. You may be exceeding its capability. H 12 has more going on than 10 whether you use it all or not.