Here's my situation; I have a 2011 MacBook Air running Windows 7, and I'm looking for a way to change the USB host controller or hub's speed from high-speed (480Mbps) to full-speed (12Mbps).
I know high-speed is backward compatible, but I need the controller or hub itself to run at full-speed, since I'm testing some 433MHz radio hardware that gets some nasty interference from USB operating at high-speed.
On a regular PC I can access the BIOS and configure the USB hardware there, but on a Mac it's a different story.
Any help is appreciated!