The USB ZED mixers are class compliant; they do not require drivers and use the built-in WDM drivers in Microsoft Windows and Apple's Core Audio drivers in Mac OSX.
Just plug the mixer into a computer via USB and you're ready to go, the device will present itself as 'USB Audio Codec' in your audio software or operating system.
Note: This information is not applicable to the ZEDi series mixers:
Dedicated drivers for the ZEDi mixers can be downloaded from our website - here