Ok, this just started happening today. I've synced in the past, I've never had an issue. I restarted both the iPhone with a reset and my PB running 10.4.11. When I use the same USB and plug it into the wall it chirps and starts charging immediately. When I take that cable and plug it into either USB port on my Mac nothing happens. It used to open iPhoto right away but that will not open, and it will not chirp or charge. Both USB ports work fine when using a mouse through them. If I open iTunes the iPhone is not showing up. Any ideas? TIA.