The macOS 10.15 Actions runner image will begin deprecation on 5/31/22 and will be fully unsupported by 12/1/22 for GitHub and ADO

[Steve-Glass]

Breaking changes

GitHub Actions is starting the deprecation process for macOS 10.15. While the image is being deprecated, You may experience longer queue times during peak usage hours. Deprecation will begin on 5/31/2022 and the image will be fully unsupported by 12/1/22

To raise awareness of the upcoming removal, we will temporarily fail jobs using macOS 10.15. Builds that are scheduled to run during the brownout periods will fail. The brownouts are scheduled for the following dates and times:

GitHub Actions:

• August 26, 14:00 UTC - August 26, 18:00 UTC
• September 2, 14:00 UTC - September 2, 18:00 UTC
• September 16, 14:00 UTC - September 16, 18:00 UTC
• September 23, 14:00 UTC - September 23, 18:00 UTC
• October 7, 14:00 UTC - October 7, 20:00 UTC
• October 14, 14:00 UTC - October 14, 20:00 UTC
• October 21, 14:00 UTC - October 21, 20:00 UTC
• October 28, 14:00 UTC - October 28, 20:00 UTC
• November 4, 14:00 UTC - November 4, 20:00 UTC
• November 11, 14:00 UTC - November 11, 20:00 UTC
• November 18, 14:00 UTC - November 18, 20:00 UTC
• November 25, 14:00 UTC - November 25, 20:00 UTC

Azure DevOps

• August 1, 12:00 UTC - August 1, 14:00 UTC
• August 9, 16:00 UTC - August 9, 18:00 UTC
• August 17, 14:00 UTC - August 17, 18:00 UTC
• August 25, 14:00 UTC - August 25, 20:00 UTC
• September 2, 12:00 UTC - September 2, 22:00 UTC
• September 8, 00:00 UTC - September 9, 00:00 UTC
• September 14, 00:00 UTC - September 15, 00:00 UTC
• September 20, 00:00 UTC - September 21, 00:00 UTC
• September 26, 00:00 UTC - September 27, 00:00 UTC
• October 14, 14:00 UTC - October 14, 20:00 UTC
• October 21, 14:00 UTC - October 21, 20:00 UTC
• October 28, 14:00 UTC - October 28, 20:00 UTC
• November 4, 14:00 UTC - November 4, 20:00 UTC
• November 11, 14:00 UTC - November 11, 20:00 UTC
• November 18, 14:00 UTC - November 18, 20:00 UTC
• November 25, 14:00 UTC - November 25, 20:00 UTC

Target date

12/1/2022

The motivation for the changes

GitHub Actions maintains the latest two stable versions of any given OS version.

Possible impact

Workflows using the macos-10.15 image label should be updated to macos-latest, macos-11, or macos-12.

Virtual environments affected

• Ubuntu 18.04
• Ubuntu 20.04
• Ubuntu 22.04
• macOS 10.15
• macOS 11
• macOS 12
• Windows Server 2019
• Windows Server 2022

Mitigation ways

N/A

[mayeut]

@Steve-Glass,

does it mean that macOS-12 will be out of BETA status by then ? #5446
does it mean that macOS-latest will transition to macOS-12 in that period ?

what to do about #4010 ? It was closed and users of virtual box were told to stick on macOS-10.15 with no other alternatives proposed.

[miketimofeev]

@mayeut yes, most likely macOS-12 will be out of beta and macOS-latest will be transitioned to macOS-12.
It looks like macOS-12 doesn't have the issue with VirtualBox, we are going to add it here #5594

[jlosito]

@miketimofeev the macOS 10 runners had vagrant installed on them while the macOS 12 runners do not. I'm able to install vagrant via brew on the v12 runners without issue, but brew bundle is unable to pin versions in the same way I could expect a certain version to be pre-installed on the runner. Are there plans to include the vagrant package in the v12 runners like they were on the v10 runners?