Greys bars displayed with scrolling

Discussion in 'Mac Basics and Help' started by microdog, Jul 16, 2015.

  1. microdog macrumors newbie

    Joined:
    Jul 16, 2015
    #1
    Hi everyone,

    I'm from France and I come here because I have a very strange issue since a few days.

    With Firefox, when I scroll, I see these strange grey bars :

    [​IMG]

    When I go lower to quit the screen zone when to problem appears and I come back to it, everything is back to normal.. Sometime, it's even parts of the page (pieces of pictures and texts) which are retain on the screen.. I sroll down and I scroll up again, and nothing is left, everything is normal.

    I observe this phenomenon only with Firefox and Twitter. Everything seems to be okay with other browsers (Chrome, Opera, Safari..).

    I try to deactivate all the addons, to re-initialise Firefox.. same problem.

    I don't think it's an hardware issue, isn't it ?

    Configuration :

    OS X 10.10.4

    iMac 27" late 2013 (bought december 2014)
    CPU : 3.5 GHz Intel Core i7
    RAM : 32 Go 1600 MHz DDR3
    GPU : Nvidia GeForce GTX 780M 4096 Mo

    Firefox 39.0

    All the updates are done via App Store.

    Any ideas of the nature of the problem ?

    Thanks for your help.

    Regards.
     
  2. microdog thread starter macrumors newbie

    Joined:
    Jul 16, 2015
    #2
    Hello everyone,

    I have an iMac 27" late 2013 (bought in December 2014). Since a few days, I noticed graphic bugs.

    Like this but only with Firefox on Twitter :

    [​IMG]

    And I got something like this twice since yesterday :

    [​IMG]

    Is a software issue ? I hope that it's not hardware. I never got issues like this before. Maybe it's related to my 10.10.3 to 10.10.4 update ?

    I ran Apple Diagnostics (D key on boot) and everything seems to be okay.

    Thanks for your help.

    Regards.

    microdog
     
  3. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #3
    Since you only see it with Firefox, that would be my first suspect.

    B
     

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