Safari keeps crashing/freezing after install of El Capitan

After the install of El Capitan, Safari 9.0 keeps locking up and or crashing.

I have a Mac Book Pro 15'' 2.3 GHz i7, 4GB Memory, 500 GB HD, iOS 10.11


When using Safari, I will have class work up and YouTube or iTunes playing. Before El Capitan it would do those processes with out a problem. Now it seems to lock up, unable to refresh, unable to exit Safari. I have to force quit and shutdown to try and get control back. Occasionally even after the shut down it will still lock up.

MacBook Pro (15-inch Mid 2012), OS X El Capitan (10.11)

Posted on Oct 14, 2015 10:06 AM

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558 replies

Jun 1, 2016 10:53 PM in response to xgrep

One thing I noticed following this thread. Members as myself with older MBP's (mine is 2009) seems do not have freezing and slow response problems after 10.11.5 update. I'm sailing with ease and only from time to time, I noticed that by clearing Safari's history (Opt/Clear History to avoid clearing cache) my MBP seems slightly faster. Otherwise, no problems of any sort.


BTW Apple: after Clearing History+Opt, can you secure that previously utilised bookmark icons remain unchanged as in Opera by not returning them to their default blue dot? Just slightly annoying.

Jun 2, 2016 6:10 AM in response to Bob Bujic

Maybe, but most of us with older MBPs ( i own 2009, 2011, 2012) never had a problem in the first place. So if that is the case, you had another conflict that was not system-board related (e.g.: a 3rd party software conflict). I have reserved judgement on some small number of 2013-14 machines, but i also have many friends with thsope and zero problems.


Remember - int he attempt to find the problem, a single good example logically rules out that model/sw combination.

Jun 2, 2016 7:21 AM in response to Luis Sequeira1

@Luis Sequeira1


Regarding the Safari tab closing/switching freeze, I believe it's primarily 2014 machines. I can't confirm 2013 but there's a slight chance somebody may have mentioned being affected. No definite confirmations of 2015 machines that I'm aware of.


Not enough collective diagnostics to be sure it's the Intel Iris that's in use when the freeze occurs but, anecdotally, that seems to be the case. I've a 2014 machine with an Intel Iris Pro and and GeForce GPU and it occurs when I'm using the Iris. I can't categorically rule out the nVidia though.

Jun 2, 2016 7:28 AM in response to palegreenghosts

@xgrep


Testing with any of these might prove interesting - I don't know what you'll find in your case.

I do have an iPhone that I could use. As I know the machine is still running processes and the logs produced during this period are available when the GUI becomes unstuck, I'm unsure of what I'd be looking for in terminal if I SSH in, other than the same log files I look at after. I'm not expecting anything peculiar with CPU, Memory or Network but the activity monitor is the only other place I can think of looking. This is really due to my lack of knowledge in various terminal techniques (oh and using an iPhone to communicate with terminal sounds painful as ****).

Jun 2, 2016 7:33 AM in response to palegreenghosts

You may be right that you wouldn't find anything new that you haven't already seen. And you're also right that doing Terminal on a phone is the worst. I just thought that if you got ambitious and had hours to kill, you could try amusing yourself with that.


If you do take a look at processes, you'll probably see a couple in "stuck" state. Most of these are harmless/irrelevant, and, in general, can be killed without damage. I was at one point able to unfreeze my system and get back to normal operation (and I mean completely normal), but, thinking of what could be going on, that might've been random luck.

Jun 2, 2016 7:37 AM in response to xgrep

If you do take a look at processes, you'll probably see a couple in "stuck" state. Most of these are harmless/irrelevant, and, in general, can be killed without damage. I was at one point able to unfreeze my system and get back to normal operation (and I mean completely normal), but, thinking of what could be going on, that might've been random luck.

Well, that's a starting point for me anyway. I was going to go back and check what you had mentioned previously as I do remember you describing this same tactic and outcome. Thanks.

Jun 2, 2016 7:55 AM in response to 49_FiveWindow

Did anybody experience the freeze without involving YouTube tabs? Mine were all YouTube related. No beach ball and no other system freeze or graphic issues. I use photoshop, Lightroom and very light video editing in iMovie and never felt like my machine doesn't perform as it should.

I don't know if it's luck or not, but i had no freeze lately, and i don't think it's because of the 10.11.5 update. Having no GPU issues outside of Safari, i don't think it's hardware related.

Anyway, what would you say the frequency of which the freezes ocur may be? In my case it happened once in 3-4 days.

Jun 2, 2016 8:13 AM in response to Tok'ra

@Tok'ra


Having no GPU issues outside of Safari, i don't think it's hardware related.

Those of us speculating on whether the tab closing/switching freeze may be a hardware issue are only having issues in Safari. Xgrep, with experience working in the hardware industry, believes it is despite the limited scope of software triggering the freeze, so I remain open minded to the idea.

Did anybody experience the freeze without involving YouTube tabs?

Since there's a variety of different freezes being discussed here you may find a variety of answers that don't tell you much. For the tab closing/switching freeze I could describe it a little better as a GUI freeze that occurs when a page containing a HTML5 video embed is redrawn or 'undrawn' (not knowing the right term for that). I've described it as switching or closing tabs but I can also redraw or undraw a Safari page by switching to another application while that page was in focus. This has occasionally caused the same GUI freeze.

In terms of HTML5 videos, I've only noticed it happening with YouTube videos. The only other HTML5 video that gives me odd behaviour is Vimeo embeds which display a glitch-like pattern when they're in an unplayed state, instead of the still image preview they should. Playing them returns them to the normal, expected behaviour. I haven't had one cause a freeze yet but stopped using Safari some time ago.

If I remember correctly, you mentioned the type of freeze you were having a few months ago and it was just Safari freezing, not the system or the GUI.

Jun 2, 2016 11:34 AM in response to mondesigns

This is an old fix but may still help you... Good luck!


  1. Sign out of iCloud altogether on your Mac.
  2. Reboot into Safe Mode.
  3. Open Safari.
    1. Open Safari Preferences.
    2. Go to Notifications tab.
    3. Clear all the website notifications listed (if any) by clicking Remove All at the bottom.
    4. Go to the Privacy tab.
    5. Click Remove All Website Data...
    6. Once that's completed, close Safari Preferences.
  4. Quit Safari
  5. Reboot Mac
  6. Go into System Preferences > iCloud
    1. Sign back in to iCloud
    2. Make sure the check box is next to Safari
  7. Quit System Preferences
  8. Open Safari, use as normal.

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Safari keeps crashing/freezing after install of El Capitan

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