After upgrading to 10.12.4 yesterday, I'm getting a weird display sleep issue with my iMac 5K. If Energy Saver turns my displays off (set for 15 minutes), the iMac display won't come back on without a reboot. Strangely, my external Dell 4K Monitor will come out of sleep.
Super annoying. Silly bug.
iMac with Retina 5K display, macOS Sierra (10.12.4)
Anyone had a chance to test 10.12.6-16G18a? Have been running it over last 2 days and the issue gone. I was affected almost 100% before that update.
@binaryage Does it remain fixed for you?
I'd given up and have left my second monitor unplugged for a couple months now. I'd love to learn that I can use it again.
Unfortunately the issue is still present in 10.12.6-16G29. It is much less frequent for me now but I experienced it again a few times. Please scratch my previous (optimistic) comments.
Interesting but I would have to agree, rare. Please keep us posted on your progress and if you have any success with the repair!
Any updates from any of you who have worked with Apple support?
My developer account bug report was closed as a duplicate. I don't know how to get updates once a ticket's in that condition.
10.12.4 display sleep bug
