828 MKIII Hybrid and ADAT Issue

[Lemontheo]

Hi
I recently acquired an 828 mk III hybrid and an 8pre Firewire. I'm using an M1 MacBook Air (OS 14.7.4). I installed the latest MOTU installer (Mac v89555) following the procedure described (https://motu.com/techsupport/technotes/ ... audio-inst).
The card is recognized on my computer. I can use the two XLR inputs, as well as the eight line inputs. The outputs are also available.
CueMix FX and MOTU Audio Setup are available and working.

However, I can't use the card's ADAT. I tried connecting the 8pre Firewire; the preamps work, but the signal doesn't appear on my computer. In CueMix FX, Bank A and Bank B appear (I selected them as "ADAT optical" in MOTU Audio Setup), but no signal appears.

I tried with another ADAT preamp (Audient ASP800) and the problem is the same. This preamp works in ADAT with a different sound card.

I should point out that I tested with different optical cables.

I've read several threads on this forum related to my problem, but nothing works

Can someone help me please?

Best

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[mikehalloran]

MOTU's overview states that what you want can be done on a Mac. It should just work.
https://motu.com/products/motuaudio/8pre

These are the two most likely things:

Are you letting your DAW access the Mac's microphone? This must be done for all audio and AV apps on a Mac.

Settings/Privacy & Security/Microphone

Have you reset everything to factory default?

https://motu.com/techsupport/technotes/reset

Although your 8pre is no longer supported, the 828mk3 Hybrid still is (I think). If the above suggestions don't work, I'd contact MOTU Support.