These are the places where third-party drivers are stored.
Fixed: Unplugging the Fast Track Ultra 8R while streaming audio from iTunes could disable all
If you use one of our products with a third-party software title like Ableton or ... M-Track Plus MKII; Oxygen 25 (3rd Gen) w/ Directlink; Oxygen 49 (3rd Gen) w/ ...
this update "improves compatibility with certain third-party USB audio ...
Driver, M-Audio M-Track Quad_3.3.11.dmg. Applies To, M-Track Quad. Operating Systems, Mac OS 10.12. Mac OS 10.13. Mac OS 10.14.
M- Audio no longer sell/support the Fast Track as they sold that
So the ONLY thing I did was update Pro Tools to the latest version of 8.0.4.
I'm using an external audio interface, "M-Audio Fast Track Pro",
UPDATE: December 17th 2019 - Avid Announce Pro Tools 2019.12 Which
If an M-Audio Fast Track Ultra 8R driver was previously installed on your system, it has to be removed before you can successfully install the new ...