5 Replies Latest reply: May 14, 2013 6:53 PM by spookybathtub
spookybathtub Level 1 Level 1 (70 points)

I updated from 10.8.2 to 10.8.3 this morning, and install the CUDA 5.0.45 update.  Now, in Safari (6.0.3), all webpages exhibit horizontal lines when scrolling quickly.  It's the same sort of effect commonly seen when playing videos when there is a problem with the graphics drivers.  I'm using a GTX570 HD 2.5GB.

Mac Pro, Mac OS X (10.6.8), 2.4GHz octocore, 32GB DDR3, GTX570
  • 1. Re: After 10.8.3 update, Safari shows tearing
    Linc Davis Level 10 Level 10 (118,525 points)

    Please read this whole message before doing anything.

    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

    The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login.


    Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
    • Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
    • When you see the gray Apple logo, release the shift key.
    • If you are prompted to log in, type your password, and then hold down the shift key again as you click  Log in.
    *Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode.


    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs. The next normal boot may also be somewhat slow.

    The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.


    Test while in safe mode. Same problem?


    After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

  • 2. Re: After 10.8.3 update, Safari shows tearing
    jpcanavera Level 1 Level 1 (0 points)

    Yep I see it too.  It just started after the update.  I see it on my iMac running Mountain Lion and my Macbook Pro running Lion. Also appears on the mail app when you scroll the list of email. Not tearing when using google chrome browser.

  • 3. Re: After 10.8.3 update, Safari shows tearing
    jpcanavera Level 1 Level 1 (0 points)

    Someone told me to try this.  Create a new user and sign on using that newly created user ID.  See if the tearing still occurs.  If not, the problem isn't hardware but something corrupted with the user preferences.  I tried and found this true.  No tearing on the new id, tearing occuring on the old.  So where do we go from hear?  I use time machine but I don't know what files are corrupted.  Anyone have any ideas on the next step?

  • 4. Re: After 10.8.3 update, Safari shows tearing
    jpcanavera Level 1 Level 1 (0 points)

    The screen tearing did not occur on the new user, but after looking closely I realized that my free memory was higher as a new user.  I have had issues since the last Safari update of Safari running very slow and finding I was pushing memory limits.  I ran into a post from someone on another site who stated that the screen tearing was due to low memory.  I had 2 gig in my Macbook Pro with a 3 gig limit.  I decided to remove one gig and replace it with 2, so I'm now at the 3 gig limit.  Interesting in that since this change, I'm sitting with 1.2 gig to 800 meg free, and the screen tearing has stopped.  I've come to the conclusion that the last release of Safari increased its need for memory which put me on the edge.  So to spookbathtub who created this thread, you might want to check your free memory.  Mine was in the 200K mode or less when using Safari.  You might just want to buy some more and see if the probelm goes away.



  • 5. Re: After 10.8.3 update, Safari shows tearing
    spookybathtub Level 1 Level 1 (70 points)

    My original problem happened on all webpages, when scrolling.  That problem has actually gone away some time over the last 2 months, and I actually forgot about it.  My new problem happens only when watching web videos full-screen.  There is sometimes horizontal tearing, and sometimes full-screen flashes.  I just checked the RAM usage, and it happens when I have more than 10GB free.  I will try creating a new user later and see what happens.