I have a 27 inch mid 2010 iMac (with the WiFi problem fixed) 10.8.2
I also have a new 2012 Mac Mini. 10.8.2 + OSX Server (no monitor or keyboard/mouse)
(Both are connected via WiFi to a FIOS - Verizon/ActionTec MI424WR-GEN3I router.)
Randomly, the Mac Mini dropps out of sight to the iMac -- i.e. it no longer shows up in the "Shared" section of the Finder and, consequently I can no longer "screen share" with it.
However, OSX server continupus to serve up web pages as expected -- I can ssh into the Mini from the iMac with no problem (i.e. IP connectivity is fine). My Epson WiFi printer and my son's XP based PC show up in the "Shared" section of the FInder. Only the Mac Mini is missing.
At that point, the only way I know of to get the Mac Mini visible again is to do a "sudo shutdown -r" and viola it reappears in the Finder on the iMac.
Is there some other way to get the Mini to show up in the Finder of the iMac?
Is there some kind of "wake-up" command I can send from the iMac to the MIni via ssh?