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How do I determine if I have one of the Pioneer superdrives w/o taking my iMac apart? Should I assume the generic pioneer or optiarc should work? iMac 20" - Model 2133 - early 2008 purchase Thanks Bruce

The listed drive for your machine is Apple part number 661-4637. Here are the drives that iFixit sells for your machine: http://www.ifixit.com/Mac-Parts/iMac-20%… Update (07/04/2011) Here’s how to replace it: iMac Intel 20" EMC 2133 and 2210 Optical Drive Replacement