mid 2011 Mac mini won't AirDrop
I cannot get my mid 2011 Mac mini to show up on other's Macs' AirDrop windows. The other Macs (mid 2010 MacBook Pro, iMac 24") show up in the Mac mini's AirDrop window, just not vice versa. I even used a Terminal command hack but that did nothing. I even tried the old trick of sending a file to MBP first to have mini show up, but it disappears on the MBP as soon as the transfer is complete...nothing can be sent back to the mini via AirDrop before it vanishes.
The Mac mini is up-to-date (10.9.2) and is on the same wireless home network, but no show.
Mac mini, OS X Mountain Lion, 2.26GHz, 8GB RAM