I have tried to install linux by usb, but the snow leopard ios does not recognize the usb, if you press options during boot you only can see the main Mac drive. I did tried a package method which you put inside the terminal but it still does not recognize the usb. Do I need a hard disk? and if yes where can i order one. If there is a way without a hard disk I can give it a try if you give me some guidance. The imac its for my son since its old and no longer supported he gets basically no use of many applications which wont connect to the internet cause its not longer supported. Thanks in advance.