Applies to: Scarlett (whole range)
If you are unable to use your interface as an input or output device on Mac OS, you should first check that the Scarlett is being detected by the Mac by running a System Report.
To do this click on Apple Logo > About This Mac > System Report.
Then check that the Scarlett appears under Hardware > USB.
If the interface is appearing correctly here but is not appearing in System Preferences > Sound or under the Audio section in the System Report then you will need to trash your Mac OS X Audio Preferences.
If you are still having problems selecting your interface once you have performed these steps then please Contact Technical Support.