Maybe this is related to a conflict with a particular software ?
Especially the video driver could be at fault where some security fixes
were made. I have VMware fusion and Duet display installed on the Macs
where I see the issue.
I have the same exact issue on 3 of my mac at home (Macbook Pro 15"
Retina mid-2015, another 2012, and macmini 2011). All pausing randomly
due to windowserver hanging. Has apple provided any updates in your
case? I find that odd that not more people ...
