Download the latest M-Audio Fast Track Pro driver for MacOS X from the ...
Did you select the fast track in Garageband preferences?
Compliant' mean? Potential Symptoms and Potential Causes; Quick Test.
I followed the link given on the M-Audio website for Fast Track drivers
S/PDIF Digital I/O, Mac and Windows Compatible, Includes Pro Tools M-Powered Essentials.
Buy M-Audio Fast Track Pro 4x4 Mobile USB Audio/MIDI Interface with Preamps: ... Mac and PC compatible; class compliant with Mac OS X 10.3.9 and higher* ...
Fast Track Pro is compatible with most popular PC and Mac music software. USB connection and bus power along with class compliancy for Mac ...
functionality in class-compliant mode, patch available for more features.
Should work, at least, I don't see any reason why it shouldn't work. The FastTrack Pro is for the most part a class compliant USB audio interface.
12 Dec 2017 I'm having problems with M-Audio "Fast Track Pro" (MacOs High Sierra) of 44.1 KHz/16-bit from the default class-compliant driver ...