tox.ini, GH Actions: Update macOS environments to macOS 11, 12

[mkoeppe]

The macOS-10.15 environment is deprecated and will be unsupported on 2022-12-01. Homebrew packages are already not available any more.

• https://github.com/actions/virtual-environments
• https://github.com/actions/virtual-environments/blob/main/images/macos/macos-12-Readme.md
• https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md:
• https://github.com/actions/virtual-environments/blob/main/images/macos/macos-10.15-Readme.md:

There's no macOS 13 environment yet.

Possible follow-up:

• Add variants that test with an actual XCode installation (not XCode CLT) because the SDK paths are different, and there may be other subtle differences. GH Actions install location: see https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md#xcode

Depends on #33788

CC: @culler @dimpase @vbraun

Component: porting

Author: Matthias Koeppe

Branch/Commit: f185d68

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/32570

[mkoeppe]

Dependencies: #32703

[mkoeppe]

comment:3

Update for Sage 9.5 done in #32703. Let's keep this ticket for the next update

[mkoeppe]

Changed dependencies from #32703 to #33788

[mkoeppe]

Branch: u/mkoeppe/tox_ini__gh_actions__update_macos_environments

[mkoeppe]

Commit: 37ac84a

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

b5c5e44	Merge #33788
37ac84a	.github/workflows/ci-macos.yml: Update tested macos versions, remove test of outdated python from python.org

[sagetrac-git]

Changed commit from 37ac84a to f185d68

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

f185d68

.github/workflows/ci-macos.yml: Update tested macos versions, remove test of outdated python from python.org

[mkoeppe]

Reviewer: https://github.com/mkoeppe/sage/actions/runs/3448209170

[dimpase]

comment:15

no macos-13 ? Is it on purpose, or due to GitHub not having it yet?

[dimpase]

Changed reviewer from https://github.com/mkoeppe/sage/actions/runs/3448209170 to Dima Pasechnik

[dimpase]

comment:16

ah, OK

[mkoeppe]

comment:17

Thanks!

[vbraun]

Changed branch from u/mkoeppe/tox_ini__gh_actions__update_macos_environments to f185d68