Aluratek USB 3.0 Port Extender for iMac (AUHM0301F) Made specifically to work with iMac (released November 2012 or later), AUHM0301F simply plugs into one of the USB ports on the back of your iMac. The creative "J" shape design of AUHM0301F extends a USB 3.0 port around to the front of your computer and snugly attaches into one of the air-vent holes on the bottom edge of your iMac. High-speed data transfer of up to 5 Gbps Use multiple port extenders together to add more than one USB port to the front Plug-n-Play, Hot swappable, and Hot pluggable