Pioneer has been researching compatibility with OS X Mountain Lion v10.8 since its release. As soon as we verify compatibility with our products, we will release compatibility information here in the forums as well as on the Pioneer DJ support site.
Current software (Firmware and Driver software) may not work properly with OS X Mountain Lion v10.8 and normal operation is not guaranteed at this moment.
For more detail about OS X Mountain Lion v10.8, please refer to the Apple website - http://www.apple.com/osx/
Thank you for purchasing Pioneer products.