4k iMac display issues

Discussion in 'iMac' started by grumpywino, Apr 12, 2017.

  1. grumpywino macrumors newbie

    grumpywino

    Joined:
    Oct 5, 2016
    #1
    Before I go down the black hole of troubleshooting does anyone have any pointers for this kinda issue? See the attached screenshot, it's the only screenshot I managed to get. It's happened a few times today, a restart puts it right but...I can provide more info but just wondered if this is enough to get an idea of what is up. It's a new one for me. Thanks in advance.
    --- Post Merged, Apr 12, 2017 ---
    A couple more, it's happened again.
     

    Attached Files:

  2. grumpywino thread starter macrumors newbie

    grumpywino

    Joined:
    Oct 5, 2016
    #2
    So it could be a 10.12.4 issue as some users are having a range if problems including graphic glitches (some have noted when using youtube etc). Diagnostics test found no issues and I have reset NVRAM. Not sure how to proceed. I can use Time Machine to go back to 10.12.3, or wait and see........
     

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