iPod nano 6G not recognized
On my MacBook Pro (mid 2011) a refurbished iPod nano fresh from Apple's repair service is not recognized. If it shows up at all, I am told that it is corrupted and needs to be restored. On my wife's MacBook Pro (Early 2012), however, it is immediately recognized.
What could the reaons for this be? Where is the corruption on my Mac?
MacBook Pro, Mac OS X (10.7.3)