GitHub Actions removals · checked

macos-12 runner removed on 3 Dec 2024: what to use instead

macOS 12 runner image: removed 3 Dec 2024, 675 days ago. Jobs that ask for macos-12 are terminated with an error: the image is gone. The fix: Change runs-on to macos-15. Check your workflows now, with nothing to install: grep -rnE "macos-12" .github/workflows

$ grep -rnE "macos-12" .github/workflows

Run it from the repository root; it needs nothing installed and sends nothing anywhere. It finds each name as written in your workflow files; a value set in another file and passed in (a matrix from JSON, a reusable workflow's input) needs a look of its own. The fix is in the first paragraph above. The dates come from this data.

The facts

What
macOS 12 runner image
Matches
Runner labels macos-12, in runs-on or a matrix
Effect
Breaks a job
Announced
1 October 2024
In effect since
3 Dec 2024removed 3 Dec 2024, 675 days ago
After the date
Jobs that ask for macos-12 are terminated with an error: the image is gone.
The fix
Change runs-on to macos-15.
Replace
macos-12 → macos-15

Sources

An email before each brownout, for the repos you watch, is not built.

It would re-read your workflows every day and email you a week and a day before each brownout or removal that would hit them, with no change to your repo. agentcheck's free hourly watch covers MCP servers only today. If you would pay for this one, say so with one click. The click is counted; nothing else is sent or stored.

Other GitHub Actions removals

Every removal, by date

actions-eol is a free tool from agentcheck, which runs scheduled checks of your endpoints and alerts you when an answer changes. Dates come from GitHub's own pages, read on the day shown; github.com only, since GitHub Enterprise Server keeps its own schedule.