I have 2 Apple TV 1st generation and using iMac and iTunes(10,7). Has been working well for years until Today when it no longer shows up in devices list? I have tried rebooting iMac and everything else such as updating and uninstalling and reinstalling and reset settings etc.... but nothing? i own 4 cumputers ( mac mini 2011,imac 2009, macbook pro late 2008 and mac book Black version 2006) in any of those show up in devices list. iTunes is 10.7 in 3 of them; imac, pro, mini., and OSX 10.7.5. Itunes 10.6 on mac book and OSX 10.5.8 Can somebody HELP ME ?