K_VOLUME_UP and K_VOLUME_DOWN work in macOS

[peterjc]

Tested via ZMK Studio, both the 'keyboard' and the 'consumer' volume up/down work on macOS Sequoia 15.6.1

PR check-list

• Branch has a clean commit history
• Additional tests are included, if changing behaviors/core code that is testable.
• Proper Copyright + License headers added to applicable files (Generally, we stick to "The ZMK Contributors" for copyrights to help avoid churn when files get edited)
• Pre-commit used to check formatting of files, commit messages, etc.
• Includes any necessary documentation changes.

[peterjc]

[peterjc]

Also, can I setup K_VOLUME_UP2 and K_VOLUME_DOWN2 from Studio to test them too?

[caksoylar]

It doesn't look like they are exposed in https://github.com/zmkfirmware/zmk-studio/blob/main/src/keyboard-and-consumer-usage-tables.json, it is supposed to be id 237-238 (0xED).

[peterjc]

Tweaking ZMK Studio and building it isn't something I was planning to tackle (to test K_VOLUME_UP2 and K_VOLUME_DOWN2).

I think this small PR is complete and ready to merge.

[nmunnich]

I wonder if this should also be given a footnote about MacOS versions, considering #541

[peterjc]

Saying they didn't work in macOS "Big Sur" 11, but are working as of macOS "Sequoia" 15?

That can be narrowed down if we get more data.

[caksoylar]

I am OK merging this as is. The footnote might be nice but if we can't get more testing done, then having the data for a recent version seems good enough.

[peterjc]

I realise I have an older Intel Mac stuck on an older version of macOS which I could try this on...