Possible virus after recovery using a start up disk

Discussion in 'macOS Mojave (10.14)' started by kmcilroy, Apr 30, 2019.

  1. kmcilroy macrumors newbie

    Apr 30, 2019
    I recently had to recover my mac and reinstall the os using a start up disk which I created via a website called osxdaily. Since then I have noticed graphic issues, (screen brightness changing and weird pixalated images). See attached image. Any guidance would be great as to how to resolve this.

    Attached Files:

  2. tyc0746 macrumors member

    Apr 3, 2019
    I don't know what the OSXdaily website process is, but why not just use the built in recovery partition or the internet recovery option?
  3. NoBoMac macrumors 68020

    Jul 1, 2014
    What vintage Mac? Maybe the GPU is dying.

    Boot into Safe Mode, see if still issues: if so, GPU or something else is dying/broken.
  4. kmcilroy thread starter macrumors newbie

    Apr 30, 2019
    Using a Macbook Pro Mid 2012, it totally died a couple of months ago and had to use my older imac which isn't compatable with newer versions of osx so I had to use an alternative website to download Mojave and create the startup disk (it wouldnt allow me to download direct from apple as it was not compatable with the older imac).
    --- Post Merged, Apr 30, 2019 ---
    Mid 2012 Macbook Pro, thanks, I'll try that.
  5. tyc0746 macrumors member

    Apr 3, 2019
    It could be that the version you’ve downloaded/installed on the other machine is not compatible with the other machine...maybe doesn’t contain the correct display drivers?

    If the broken machine starts up to at least the boot screen, then holding down Command-R at boot will start into the recovery partition which should let you reinstall the version that came with your system.

    If you want the latest version that will run on your computer, then Internet Recovery (Command-Option-R)will do something similar, but it takes a long time as it has to download the whole installer to progress.
  6. superscape macrumors 6502a


    Feb 12, 2008
    East Riding of Yorkshire, UK

    The above is sensible. Just wanted to chip in and say that it's (almost certainly) not a virus. I don't want restart the whole "Macs don't get viruses/oh yes they do" argument, but suffice to say that it'd be extremely unlikely (but not 100% impossible, ever).
  7. NoBoMac macrumors 68020

    Jul 1, 2014
    Add: this MBP has Intel and Nvidia GPUs, and the machine can be configured to use only the Intel. Some programs/scripts/instructions on the interwebs to assist with that, if the Nvidia is failing.
  8. Mr_Brightside_@ macrumors 68030


    Sep 23, 2005
    Is yours 13”? If so likely an issue with the RAM bracket/clips, I’ve seen it before. Try removing each RAM chip individually and testing with one at a time.
    It’s not a virus.
  9. SecuritySteve macrumors 6502a


    Jul 6, 2017
    Definitely not a virus. If you had a virus you would see behavior such as unexpected prompts for information, user credentials, or in the worst cases your system would lock itself down with ransomeware.

    Stuff like this just means something is broken.
  10. mrdunderhead macrumors member


    Jun 14, 2015
    Simple really 2012 Macbook pro models are known for GPU failures and issues with the screen cable going out I would try the machine if still functional in some capacity to a external monitor and see if the same issues happen if not then its the display going out if it continue's to have issues its the GPU.
  11. BasicGreatGuy Contributor


    Sep 21, 2012
    In the middle of several books.
    There are no Mac viruses in the wild. Your problem could be a corrupt OS install, or possible hardware problem. Try reinstalling the OS.

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10 April 30, 2019