OSX Monterey E-MU 0404 USB Success

[iRet]

Everything functional.
Sharing my experience as it might be useful for someone else.

The process:

I had to remove some obsolete and unused kext hanging around.
For me it was Nvidia web driver and HoRNDIS.
I think it has to do with the installer script.
After this the installation succeeded.

I prefer to disable SIP only for kext.

1. In recovery terminal: csrutil disable
2. Reboot and install driver with shell script
3. In recovery terminal: csrutil enable --without kext
4. Reboot and check: csrutil status

Apple Internal: disabled
Kext Signing: disabled
Filesystem Protections: enabled
Debugging Restrictions: enabled
DTrace Restrictions: enabled
NVRAM Protections: enabled
BaseSystem Verification: enabled

Additional steps:

It was asking me to allow EMUMIDIDriver.plugin every time I start DAW.
In order to fix I ran: sudo xattr -rd com.apple.quarantine /Library/Audio/MIDI\ Drivers/EMUMIDIDriver.plugin

[jkwinta]

Do you know/remember what kext you did remove?
Or how you determined that?

[jkwinta]

Nevermind, it looks like it runs from the executable inside the package, but not from the package itself, hmm....