QUOTE: OS9 and older is classic. I have 1 G3 1 G4 and 1 intel mac and do not use classic at all. It you plan on running programs that are not OSX you will need it. >------------------------------ Hi Warren, I've only been running this Mac with OS X for 2 days so at the moment I have no idea what are OS X and OS 9 applications... so I suppose the question really should have been "am I likely to need it?" Actually as primarally a PC user I've got loads of questions I want to ask, some of them I've found the answer to myself like "how do I/do I need to defrad/optimize the drive." But others like installing aps are eluding me... eg I've downloaded Firefox and double-clicked on the file to install it but it doesn't do what I expect it to do... install on the drive... it seems to exist as a volume (i think that's what it's called) on the desktop which dismounts? when I shutdown. Then the next time I want to use it i have to double-click on the .dmg file again to "re-install" it... what am I doing wrong? X11, Onyx, Open Office, MSN Messenger and The gimp all installed on the drive. So I'm confused. ?( Also iChat doesn't seem to do anything when I click on it. Celia _________________________________________________________________ Solve the Conspiracy and win fantastic prizes! http://www.theconspiracygame.co.uk/