Why does this keep popping up on my computer?
The name of your computer “iMac-D49A20FF7A3E (2)” is already in use on this network. The name has been changed to “iMac-D49A20FF7A3E (3)”.
To change the name of your computer, open System Preferences and click Sharing, then type the name in the Computer Name field.
iMac, Mac OS X (10.6.8), Lacie 1TB drive for Tm