As long as I’ve know, other than a couple of very odd “non standards”, Apple’s USB ports have provided 5V 500mA of power, regardless of it being USB 1.0 or USB 2.0. Now today, a tech document was updated by Apple;
“On some newer Intel-based Macs, such as the MacBook (13-inch, Late 2007), when a device requiring more than 5V and 500mA is connected, the port with that device connected to it becomes a high-powered port capable of offering up to 1200 mA at 12 V. That port will continue to operate as a high-powered port until the device is removed.”
Very very interesting. This obviously must be for the iPad, which is going to take a 10W power source;
So… Perhaps we’ll be seeing some kind of enabler being included with Mac OS X 10.6.3 or in the iPad software CD that’s bound to be included with them. Wonder if that means people with older systems will just recharge slower?
The old article is cached here (Probably not for long, though)
It clearly says :
“The USB ports on Macintosh computers provide 5 V and 500 mA for each port, regardless of whether the port is USB 1.1 or USB 2.0. This is in compliance with USB specifications.”
The only other Apple system to include a higher power USB port that I can think of is the MacBook Air, for it’s external superdrive, but there are no specs at all on what power it’s drawing, or that the USB port is putting out anything more than 5V. This comment about 12V is very, very interesting.