PARALLELS DESKTOP FOR MAC INITIAL RELEASE UPGRADE
Likewise, did the Parallels Desktop 12 upgrade lead to resolution of the crashes? I cannot be sure. Cause and effect?ĭid an incompatibility between Parallels Desktop 11 (latest build) and macOS Sierra 10.12.1 cause my three hard crashes? I cannot be positive, as I didn't have time to troubleshoot it.
I therefore, did the Desktop 12 upgrade, and the instability vanished immediately. I hadn't planned on upgrading Desktop 11 because of reports, like those in this thread, that it would work with Sierra, however, I don't mind too much spending $50/year to keep it current because it's critical on my setup. Since this is a production machine, I didn't have the time to troubleshoot it further. This crashing ranged from locking up the whole iMac blocking input from keyboard and mouse, something that I've almost never seen in my 2 years with this computer, to coming out of sleep mode showing nothing but a black screen on both the iMac display and a secondary 4K display with a movable arrow cursor that was rapidly replaced with a movable perpetual beachball, something I'd never seen before. As soon as I'd finished the Sierra (again, 10.12.1) upgrade, I encountered instability and system freezing when Parallels was running.
I delayed upgrading my iMac 5K from El Capitan to Sierra until macOS 10.12.1 was available - i.e., I never tired to run Parallels Desktop 11 under Sierra 10.12.
Please remember that this report is purely anecdotal.
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