I have a brand new iMac. I have calibrated it once already. I am trying to calibrate it a second time, but I cannot seem to get the contrast/brightness indicator to respond. I have increased the brightness slider on my display to 100% (as instructed by Gretag) but the Gretag indicator is not moving at all.
I am a longtime Windows user who recently made the switch to Mac. My Dell LCD was a breeze to calibrate by comparison!
Can someone help me? Would be much appreciated!