Today we have a Mac OS 10.8 (Mountain Lion) beta software package for Alfa AWUS036NH and AWUS036NEH. The package can be downloaded here.
This beta is for new installs only. If you already have software for your AWUS036NH or AWUS036NEH on your Mac, please uninstall it in full before installing this beta package.
While we are not able to officially support AWUS036NH or AWUS036NEH on Mountain Lion yet, please send your feedback and bug reports to us by email.