Using Steinberg's range of audio interfaces on macOS Big Sur or newer may have some limitations. Please find the details below.

#1
32-bit integer playback/recording not available

[applies to AXR4T/AXR4U audio interface]

Problem

Currently, the Yamaha Steinberg Thunderbolt (High Precision)(for AXR4T) and Steinberg AXR4 (High Precision)(for AXR4U) drivers cannot function properly on macOS 11.
As a result, the AXR4 cannot play back or record audio in 32-bit integer format on macOS 11.

Workaround

There is no workaround for 32-bit integer playback and recording.
However, playback and recording in other formats is possible by selecting the Yamaha Steinberg Thunderbolt, Steinberg AXR4 2TR or Steinberg AXR4 (for AXR4U) driver.
Users can still play an existing 32-bit integer audio file in the Steinberg DAW by choosing one of these drivers. In that case, it will be played back with 24-bit precision.
Users can also export an audio file as 32-bit integer or 64-bit float formats within the Steinberg DAW.

Solution

The issue is resolved in macOS 12 Monterey.

#2
Name of digital ports is not changed

[applies to AXR4T/AXR4U audio interface]

Problem

The name of the digital port in the audio application is not properly changed when the digital I/O mode is changed. This happens only when the digital I/O mode is changed, but the channel count of the digital port is not changed. (Ex. changing ADAT to AES when Fs=48kHz)

Workaround

Restart the audio application after changing the digital I/O mode. Alternatively, reset the ASIO driver in the application if possible.

Solution

Not defined yet. There was a change in the macOS specifications. We are considering supporting it on the application side.

#3
Clock source changes in setup screen only

[applies to AXR4U audio interface]

Problem

On macOS 11, clock source cannot be changed either from the Audio MIDI Setup nor from the Studio Setup menu on the Cubase.

Workaround

Change the clock source from the SYSTEM SETUP screen on the hardware.

Solution

This issue has been resolved in macOS 11.4.x and we recommend an update to this version or any later release.

#4
CMC Editor loses connection

[applies to CMC-PD, CMC-QC interfaces]

Problem

CMC-PD(QC) Editor loses connection to the device 1 to 5 minutes after it is set to the background.

Workaround

• In the Finder, open the "Application" folder.
• CTRL-click on the CMC-PD(QC) Editor icon to open the menu.
• Select "Get Info":
  
  
• In the dialog, check the "Prevent App Nap" check box:
  
  

Solution

This issue will be solved with the next version of the TOOLS for CMC.