iTunes (Mac) doesn't show Devices
I have iPhone 4S and iPad, both runing iOS 6. All software on MacBook Pro is up to date. The Devices menu is missing. They are plugged into chargers, right next to the Mac.
I plugged each directly into a USB port, and iTunes Devices recognized each. I sync'ed and backed up each. As I unplugged each, it disappeared from Devices. I restarted the Mac and the iPad was recognized, but only once. The iPhone was not recognized.
I powered down each one and restarted them. iTunes recognized each and began automatically sync'ing it. I quit iTunes and relaunched. Only the iPhone was recognized and autosync'ed. I quit and relaunched iTunes. Neither one appeared.
Finally, I powered down all devices. Restarted Mac and iTunes. Restarted iPhone and iPad. Both were recognized. Shut down iTunes and restarted. No devices recognized.
MacBook Pro, Mac OS X (10.7.5)