I called tech support and they got it reconnected, but the next day the same thing happened.
I set it up wirelessly and it worked fine, but when I shut everything down and booted up the next day, the MacBook did not see the ScanSnap. However, I prefer that it connect by wireless, and not USB. I have a MacBook Pro, running OSX 10.9.2, and last week I purchased a ScanSnap iX500, which is a great document scanner.
