Hello all, I would truly appreciate any input on this because I have pursued quite a few avenues to no avail: I have a 2011 Macbook Air and a Seagate GoFlex 500GB external harddrive. The harddrive is not recognized by the computer anymore (it does not show up in disk utility). However, the harddrive powers up, the light is on, it spins -- apparently -- normally -- it just does not make its presence known on my Air. I have tried connecting it to a PC (I have not had a suitable mac) and it was not recognized either. I would suspect that the fault is with the harddrive but I am not sure. Thank you in advance for any input.