BUG -Mercury Transmit will not use screen 2 in 3 screen setups on Mac OS 10.13.6
When using Premiere Pro 13.1 on multiple MacPros with 3 monitors attached, Mercury transmit will NOT allow Monitor 2 to be used for playback. When selecting Monitor two, Monitor 3 will automatically be selected. This behaviour does NOT occur with 13.0.3. Selecting alternate render options (Metal/CUDA/Open CL) does not fix the issue.
Erich Hentschel commented
First the preview would pop on my main screen. I created a new user and was finally able to see my preview on the correct monitor. Now I'm actually having AE hang up constantly when I have my second monitor activated for preview. Been having to use the kill process trick to save my work prior to force quitting. Been having to work without a preview monitor... not a great way to animate...
Stewart Shevin commented
I have found this bug to be a problem with RGB monitor routing via Mercury Transmit. I can get only one monitor to be full screen (which is not the one I would like). My YUV (consumer, prosumer TV) does play back a signal via HDMI from my CPU. My Blackmagic Intensity also plays back a signal.