Thu Aug 03, 2017 10:39 pm
I'm having the same issue. I was able to monitor FCPX, After Effects, and MOTU Digital Performer in UHD 23.976 before, but now I just get a black screen. When I set the control panel to 1080p I get signal. Like Andrew, I see the picture in the lcd, just not on my monitor. I'm also using a 2013 "trashcan" Mac Pro, monitoring through HDMI. However, unlike Andrew, I thought the reason was the firmware update, but since he hadn't updated the firmware update and I had, maybe its just this version of Desktop Video. I'm gonna try to go back to an earlier version.
-UPDATE-
This morning I realized my 4k TV had auto-updated its firmware at about the same time I had updated all my BM firmware/software, and had reset its HDMI input settings. I set it back to "enhanced" and tried it again. Still nothing. I physically unplugged power, thunderbolt and HDMI cables from the Ultrastudio, re-plugged it in, and ... SUCCESS! I'm getting UHD in Final Cut and After Effects! (Haven't tried DP yet) again! Even better, After Effects 1080p compositions are no longer looking pixelated and interlaced! Thanks guys!