Increasing USB port Power Output I have a new (2013) 15" Macbook Pro.

The USB port provides 500mA which is not good enough for many devices I use (Hard Drive, 3G Dongle...)

Reading this article: http://support.apple.com/kb/HT4049 it seems that these ports are capable of delivering more power, but it's limited to Apple products.

Is it possible to hack the mac, and change this default value (to something like 900mA?)
Apple USB 3.0 ports will output up to 1100mA if requested, USB 2.0 is limited to 500mA
You can check the current requirements for any attached device in Apple Menu &gt; About this Mac &gt; More Info (later macOS versions now labelled 'System Report…')... USB
I only have USB 2.0 ports on this machine, but see pic...