I know this feature became available in iTunes 11.01 but I do not see the feature available anyway. I can only manually input the numbers themselves. Is it only available for Mountain Lion users or new models? Because I have a mid-2010 15 in. MacBook Pro and has Lion.
Strange, then. I'd think it was because your MBP has an iSight camera, not a Facetime HD camera as the Early 2011 and later-model MBPs have, but my iMac also has the iSight camera and the redeem via camera feature works here. So I don't know why it wouldn't work for you.