Here are some sites that may assist you in getting your monitor behaving itself. A good place to start with brightness and contrast settings is something like 50 percent brightness and 100 percent contrast. http://www.ibiblio.org/mal/MO/philm/colortest/ http://www.scarse.org/adjust/black.html and http://www.scarse.org/adjust/white.html http://www.wodaski.com/wodaski/gamma.htm With this last one, don't worry too much about trying to match all the colours to the supposed Mac 'correctness'. You'll likely make your head explode, and there's no 'right' or 'wrong' with this, just conventions. http://www.webarchitects.co.uk/tools/gamma/