Odd question...but my 2012 Air can't see my 2008 iMac for Air Drop...yet the 2008 iMac can see the 2012 Air. Anyone know why this might be? Both are running Mountain Lion and the only odd thing I can think of is the iMac is plugged directly into the Wireless Router while the Air is WIFi. I thought this might be the reason why, but how can the iMac see the Air? (same issue with my Wife's 2011 Air).