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Level 1

16 points

Stalling for detach from IntelAccelerator, nvAccelerator

Hi All

Recently my iMac and MacBook Pro have started to hang regularly for something like up to a minute before they continue to operate normally. Often I can still move the mouse pointer during the hang, but in any case I can't click on anything any more. The message in the Console is:

kernel: Stalling for detach from IntelAccelerator

kernel: Stalling for detach from nvAccelerator

So it seems this has something to do with the graphics. This has started after the latest updates, and after I had installed VirtualBox, but I have no idea whether or not this is related to the problem. Any help is much appreciated.

OS X El Capitan (10.11.6)

Posted on Dec 25, 2016 3:22 AM

Best reply

Eric Root

Level 10

684,045 points

Posted on Dec 26, 2016 1:04 AM

Try uninstalling VirtualBox and see if it stops.

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