light grey value / contrast issues in yosemite

Discussion in 'OS X Yosemite (10.10)' started by teahouse, Aug 8, 2014.

  1. teahouse, Aug 8, 2014
    Last edited: Aug 8, 2014

    teahouse macrumors newbie

    Aug 8, 2014
    I installed Yosemite public beta a few days ago. I already love the new system.

    There are some weird issues with light greys, dark greys and color sync on my mac though.

    Apparently Yosemite turns very light and dark greys into white or black. More precisely if i create a gradient from white to black in ps cc2014 the top 10% greys appear white. Same with black.

    I played around with the pro calibration settings and my display settings but had no luck. Furthermore the issue persists on my macbook screen as well as on my external lg ips display but was definitely not an issue before the upgrade.
    So it seems to be a problem within the os.

    It becomes very obvious visiting a calibration site like

    Strangely, as long as i stay within the mid color value, colors are pretty much perfect. Just light gradients (eg. the top macrumors site gradient) look like a 256 colors gif and show sharp contour lines.

    Anyone else seen this?

    late 2008 unibody
    8gb ram
    256gb cruical ssd
    lg ips234 display over mini display port to dvi
  2. teahouse thread starter macrumors newbie

    Aug 8, 2014
    Universal Acces

    Feeling a bit stupid right now. :)

    Open your System Preferences, then Universal Access pane.
    Adjust the Enhance Contrast all the way to 'Normal'

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