For no obvious reason, MacOS is the only OS I know, that CANNOT adjust the sound volume it puts out via HDMI.

[masek@infosec.exchange]

For no obvious reason, MacOS is the only OS I know, that CANNOT adjust the sound volume it puts out via HDMI.

I can therefore recommend: https://eqmac.app/

This lets you create a virtual output device that allows volume adjustment and passes it through to HDMI.

The software has tons of other features, but that one is a life saver .

#macOS

[bob_zim@infosec.exchange]

@masek The reason is macOS sends the original digital bitstream via digital audio outputs such as TOSLINK, HDMI, even AirPlay to an AirPort Express with digital out. This guarantees the data is identical to the source data up to the point it hits a DAC. It’s a pro A/V thing, admittedly less convenient for people who don’t need that bit-for-bit guarantee.

Incidentally, most displays designed to work with Macs do audio as a USB audio interface with the volume control on the analog side. They also do brightness adjustments via USB.