For the last 15 weeks, this iMac has been freezing sporadically. I have run out of ideas, and hope that 10.11.6 fixes the bug.
crash
I may at last have found a way to reduce the frequency of freezing in OS X 10.11.4 and later.
After another system freeze, it is clear the problems in El Capitan are not fixed in 10.11.5.
Has your Mac been freezing occasionally since updating to OS X 10.11.4? You are not alone, it seems.
After a ‘Sleep Wake Failure’ and a bizarre ‘GPU Reset’, I’m not convinced that 10.11.4 is doing this iMac much good.
Things were not looking good: my Mac would not start up, and the RAID would not shut down. Stalemate.
When an app ran fine, but crashes in El Capitan, it may be SIP’s fault. Here is how to check, and more about SIP.
Why are many of my apps quitting as soon as I have launched them?
Whenever the bug occurred, it set the screen into a steady roll. The only way out was to pull down a menu command, no mean feat when pointer, menu bar and the whole caboodle are rolling past your eyes.
When I start my Mac up, the Dock crashes a few times. How can I fix this?
The Eclectic Light Company 