macOS Sierra keeps freezing

I installed Sierra on my MacBook Pro a few days ago, and several times it has frozen. First the computer stops responding to my external mouse. About 30 seconds later it stops responding to the trackpad and keyboard. I have to force a restart. Why is this?


Perhaps relevant: According to Activity Monitor, kernel_task now frequently uses several hundred (and sometimes more than 2,000) percent of my CPU. Who knew that was possible?

MacBook Pro with Retina display, macOS Sierra (10.12)

Posted on Sep 24, 2016 9:38 PM

56 replies

Oct 18, 2016 7:40 AM in response to Community User

I have been experiencing a very similar issue since I install Sierra on my 2015 13" MBP. It occurs whether standalone or on my docking station with Monitor, Bluetooth keyboard/track-pad, and external drives connected.


Description of issue:

1. If the laptop has been shutdown or in extended "Sleep" (6 hrs +), upon startup or "awaking, it will go to the login screen and freeze for 5 minutes or so until the login box appears and is accessible. When attempting to enter password, it will freeze again with initially the spinning ball which then itself freezes. Again after several minutes, the box becomes active and password can be entered and accepted.

2. It will take 3-4 minutes for home screen to fully appear and become accessible. Initially, only the bottom of the screen with the menu bar is loaded, but is not functional (no response to selecting). Once the full screen is loaded, the system is usually fully accessible and functional, although on occasion, it will become very sluggish and temporarily freeze.

3. At times this process fails and I have to use power button to shutdown and start the process again. This is repeatable over multiple attempts and days. I reinstalled Sierra with no change in the issue


This is beyond annoying!

Oct 24, 2016 1:18 PM in response to Community User

I also have the issue of the computer locking up when I am on Safari, after downloading new Sierra. With help from Apple, I saved my complete data, and wiped out the whole IMac. When I downloaded my data, it left out anything that was not exclusive Apple (i.e. Office for Mac, Firefox, etc). Yet, it still locked up when using Safari.

I reinstalled Firefox, and so far it has not locked up again. Don't know why Apple releases updates without more thorough testing?

Now how do I get Safari to work properly?

Nov 17, 2016 6:09 PM in response to Community User

I had the freezing problem for the last few weeks on my 2013 Macbook Pro, where first one program (often Safari) would freeze and give me spinning color wheel. Sometimes, after several seconds, the wheel would vanish and the program would resume working. More often, though, one by one other programs running would also stop responding and I'd have to to a hard reset to get the computer working again. Checking Activity Monitor, I noticed that the free version of Avira antivirus I had on the computer was using a lot of CPU. I uninstalled it, and (fingers crossed), I've had no freezing at all for three days now and Sierra feels like it's running much more smoothly.


FWIW...

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macOS Sierra keeps freezing

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