I've opened this thread as a clearing house for those using the Mac Pro 7.1 for all things related to music production.
Will start with some up and coming software with integration for the Apollo Twin specifically using macOS called LUNA:
www.uaudio.com
I think its been a long time coming for UA to have a one-stop production interface.
Will start with some up and coming software with integration for the Apollo Twin specifically using macOS called LUNA:

LUNA Recording System - Analog Sound at the Speed of Light
LUNA Recording System gives Apollo interface owners the fastest recording environment for music production, editing, and mixing.
I think its been a long time coming for UA to have a one-stop production interface.