IN STOCK You will receive an Apple original Mac OS 8.5.1 CD in sleeve. FULL installation. You do not need any other operating system installed to use this CD. Beware of others selling the CDs which say "iMac", "iBook" or "PowerMac G3". Click here for more information. YOU NEED THIS CD IF ALL OF THE FOLLOWING ARE TRUE (click here.): What's the most current OS your Mac will support? Find out by clicking here. What is Expedited Processing? Find out here. $119.99 Options: ---Expedited Processing (+$2.99) Hardcore Mac sales@hardcoremac.com (520) 723-8702 - (520)-723-8704 fax