@Gloiter
The ZEDi series is class compliant so does not use drivers when connecting to a Mac.
It should just show up as a core audio input device in both the system settings and with any audio app (including Ableton).
We’d therefore recommend checking hardware connections (different ports, adaptors, cables) as well as system security settings (which can block audio devices to prevent snooping).
If you are still having issues though, you can contact us directly using https://support.allen-heath.com
Thanks,
Keith.