Hi: OK, I am a windows dude, you can tell. I need to turn off unnecessary processes on a Mac. In "Windows", I would edit the startup processes... and in Computer admin, turn off all "services" I did not need. What do I do on a Mac? I need it to be permanent, not temporary (like I know how to shut off iTunes helper for a session- I want it off after restarts, too. Also, I want to pare this mac down to just the essentials- any advice for what to kill, and what I should not touch? Thanks!