Error message: The code you entered is not recognized as a valid code.
Mac users who are qualified for a free OS X Mountain Lion upgrade are facing a new problem. The redemption code offered by Apple (only to Retina MacBook Pro users) just doesn’t work.
If you are one of the new Mac owner, simply head over to Mac App Store, enter the discount code and you will know the generated code is not valid.
Solution: Contact Apple Support
Send an email message to email@example.com and ask for the new code. Here’s an email from Apple received by a Retina MacBook owner who was unable to freely download OS X Mountain Lion:
I understand you received a code for Mountain Lion but it didn’t work. I can imagine you’re eager to get your computer updated. I will be happy to assist you today.
I’m sorry to hear that you’ve not yet been able to upgrade to OS X Mountain Lion because the code you received could not be redeemed.
I realize that you hadn’t in fact used this code already and that you’d like to begin enjoying the features of Apple’s latest OS. I’ll be happy to assist in getting this resolved.
To be clear, customers who purchase a qualifying new Mac computer between June 11, 2012 and July 25, 2012, that does not include OS X Mountain Lion can upgrade to OS X Mountain Lion for free.
To participate in this program you must be entered by August 24, 2012. I’m sorry to hear that, on redeeming the initial upgrade code you received, you were unable to proceed because an error indicated the code was invalid or had already been used.
If your claim is accepted, a valid replacement code will be sent to you by email. There will be no need to submit a new claim. I apologize for any inconvenience in this regard. Please let me know if you do not receive a replacement code within 24-48 hours, as I’ll be happy to look into things further for you.