I've thought up a few more questions about Macs and hope I can find some answers... One question is in regards to security, specifically dealing with laptops. 1) What sort of logon/users is used? I'm familiar with the NT OS & file systems. Is there a logon screen during bootup/wakeup? 2) What sort of security (like NTFS) does the filesystem offer? 3) My Dell's BIOS allows me to create a password within the BIOS that prevents the laptop from booting without the password, thus not allowing someone to reformat the PC and start fresh. Is there anything like this with the Mac? Anything else I should know?