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Unable to control brightness in target display mode

5672 Views 24 Replies Latest reply: Mar 2, 2013 6:39 AM by iMacNeil RSS Branched to a new discussion.
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KelvinLeFabuleux Level 1 Level 1 (65 points)
Currently Being Moderated
Jul 1, 2011 8:37 AM

I use my 27" mid2010 iMac as a display for my MacPro. However after the Mac OS X recent update to 10.6.8, I noticed I am unable to control the screen brightness. Usually, I was able to do so using the iMac keyboard to adjust brightness etc. but now they do not respond in Target Display Mode. The brightness adjustment do respond if I am using the iMac but not anymore in Target Display Mode. This is a little frustrating as the screen is really bright and is hurting my eyes.

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