AirDrop doesn't work on my iMac
I have successfully upgraded to Lion on my Macbook Pro and iMac. By and large I'm delighted, but what the heck with only supporting AirDrop on a subset of Lion-compatible machines. My iMac is not that old! I bought it in 2008. Please explain why it doens't work on my iMac. I have AirPort and and AirPort Extreme. Should I be looking forward to more surprises from iOS 5. This is a ridiculous limitation.
iMac, Mac OS X (10.7)