Just a small heads up to mention that macOS and Windows nightly builds are now available for JACK2.

You can find them in the JACK2 GitHub actions section, each successful build will have matching artifacts.
When you open a pull request, builds will be automatically generated.
(pending approval from JACK2 maintainers, but there is typically no reason not to approve)

These artifacts include macOS-intel, macOS-universal, Ubuntu 20.04, Windows 32bit and Windows 64bit builds.
Note that neither QjackCtl or JACK-Router are included in these builds, only JACK.