Extremetech to the rescue! For all the folks who recently bought Macs or just upgraded to Mac OS 10.4, “Tiger,” there are a ton of awesome tools and utilities that’ll let you get under the hood and change the settings in a way that System Preferences never let you do! A lot of these techniques are simply commands that can be issued at the command line in Terminal, if you swing that way, but these tools bundle them up into a neat little GUI that will give you all the pleasure of changing your system settings by clicking checkboxes and moving sliders, if you don’t really dig typing in commands.
Definitely worth a try; the article is a bit lengthy, but it’s only to show you what’s possible with all of the various utilities listed in the article, and the best part is that they’re all free! If you’re a Mac user, this is a must-read:
[ http://www.extremetech.com/article2/0,1697,1852496,00.asp ]