On my iPhone 4s I go to Settings > General > iTunes Wi-Fi Sync and see Sync will resume when [PC] is available. On my wife's iPhone 4s (same iOS 5.1.1), she goes to the same place and sees Sync will resume when [Mac] is available. iTunes on each PC and Mac is logged in using the same iTunes login. My wife purchased music on the Mac that doesn't show up on the PC. The PC has the master database (75 gigs) of music (technically on an external harddrive connected via Wi-Fi). We'd like to sync her Mac purchases to the PC master database and sync her iPhone to the master database (at least while at home or permanently if necessary). She connects her iPhone via USB to the Mac and I connect my iPhone to the PC. How do we link, sync, merge iTunes music and switch my wife's iPhone iTunes Wi-Fi Sync to the PC?
