I can confirm this worked for me as well on an iMac Pro (2017). I shutdown, unplugged the system for 15 secs and powered back on after 5 secs and all is well. Thanks to @luke240 and others for verification on this.
attitudecontrol
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
From
West Des Moines, IA, United States