2015 iMac retina running latest high Sierra beta- screen issues

Discussion in 'macOS High Sierra (10.13)' started by mikecalderone, Jul 22, 2017.

  1. mikecalderone macrumors member


    Aug 5, 2015
    Laguna Niguel, CA USA
    I have my 2015 iMac Retina 5k set at maximum brightness, and every time I reboot my computer, the brightness goes to 50%. It does not save my settings.

    So I also have a 2012 iMac with the same High Sierra beta installed. The same thing happens on this iMac.

    I have two MacBook Pros retina laptops and they work fine with the the brightness settings.
    So this is only related to the iMac computers.

    Is anyone else seeing this problem?
  2. ryxn macrumors regular


    Jun 5, 2017
    I have a 2015 iMac, and I've had issues with brightness since the first beta. My brightness goes to 25% upon booting it, and I have to log in to manually fix it. I can toggle the automatic brightness control off and it'll toggle it back on after restarting it.

    Overall, it's an issue, but nothing to be worried about since I know other users have experienced the same thing. I'm expecting it to get resolved with the next iteration or at the very least, before it goes Golden. Just a minor inconvenience.

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