OS 9.0.8 includes some USB improvements.
It will also support downgrades from OS 10.0 avoiding loss of data created and stored with OS 10.
Rig Manager 3.4.32 for Windows(R)/macOS(R) and Rig Manager 1.4.0 for iOS(R) required!
Rig Manager 3.4.32 requires at least Windows(R) 10 or macOS(R) 10.14.