I want to put a working superdrive from a very old MBP into an old MBP - replacing the defective superdrive in the old machine. The very old MBP is a 2006 15" (panasonic uj 857-c superdrive) The old MBP is a 2007 15" (hitachi HL-DT-ST DVDRW GSA-S10N superdrive) Both are machines are running SL 10.6.8 I tested the superdrive from the very old MBP yesterday - working perfectly ! So I removed the defective superdrive from the old MBP and replaced it with the working superdrive. However, the panasonic superdrive is not recognized by the machine. It powers up and spins, but there is no "communication". System profiler: ATA - no devices found Disk burning - no devices found I've tried resetting both smc & pram on a few occasions, as well as cleaning all contacts, to no avail. Any ideas ?