Added minimal supported macOS version to CI builds.

[23rd]

Pull request checklist:

• CHANGELOG.md was updated, if applicable

Description

Recently, nightly builds stopped working on macOS with outdated versions (I guess this is caused by the macos-latest being macos-11.0).

Popup

That makes me sad.
Let's support macOS Catalina for a while.

[pajlada]

Does this make the builds stop working on newer macos systems? If not then this is fine by me for now.
Long term, I suppose expanding the number of macos builds would be the way to go but I'd rather not do that until we've refactored the build workflows

[jupjohn]

It should be noticed that macOS Catalina (10.5) is marked a deprecated on GitHub's runner page. I'd rather we didn't support deprecated images but I understand that a fair chunk of users still use 10.5.

Source: https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources

[23rd]

Does this make the builds stop working on newer macos systems?

A result binary (from CI) works on 12.5 as well.

It should be noticed that macOS Catalina (10.5) is marked a deprecated on GitHub's runner page.

My PR does not change a version of the macOS runner, it is still macos-latest.

[jupjohn]

My PR does not change a version of the macOS runner, it is still macos-latest.

Misread, sorry!

[pajlada]

Merging this in as in as a stop-gap solution

Would be nice with a support matrix for what versions of OSes we support, not sure if it makes sense to keep in the wiki or the repo.

like

os	support
macos montgomery (12.5)	✔️
macos scooby (11.7)	✔️*requires manual installation of libXD