Having only one display port on your Mac can put a real crimp in your plans to be the master of the monitor universe, so NewerTech has launched the USB 2.0 Display Adapter. The adapter, with a suggested retail price of US$96.00, lets users add an extra HDMI, DVI, or VGA display to their Mac. Up to four of the bus-powered adapters can be hosted on each Mac, and each adapter can support a maximum resolution of 2048 x 1152. The device also supports Windows, and can be used with Boot Camp.
Cloning and extended desktop modes are supported by the USB 2.0 Display Adapter. A secondary adapter (VGA and HDMI adapters are supplied) must be attached to connect VGA or HDMI displays. Unfortunately, the adapter doesn't allow OpenGL acceleration, so applications that use Quartz Extreme, Quartz Composer, and other related frameworks are not full supported. This means that Keynote, iPhoto, and iMovie will not see the benefit of OpenGL acceleration.
To use the adapter, your Mac must have an Intel processor and be running Mac OS X 10.4.11 or better.