superDrive wont work with my iMac

Are you talking about the built-in drive, or a separate standalone drive?

If it's built-in, try an SMC and PRAM reset: https://discussions.apple.com/docs/DOC-3603

Have a look at babowa's advice in this thread: https://discussions.apple.com/thread/5088222?answerId=22202055022#22202055022

The apple Assistance is a shame, problems like that, they don't give importance, we pay a fortune for apple products we haven't a good assistance.