macOS 26 (Tahoe) is now generally available in GitHub Actions

[erik-bershel]

Breaking changes

macOS 26 Tahoe is now generally available for all GitHub Actions.
To select one of these images, you can use one of the supported macOS 26 labels in your YAML file.

YAML-scheme for GitHub Actions:

macOS-26 Apple Silicon

jobs:
  job:
    runs-on: macos-26

jobs:
  job:
    runs-on: macos-26-xlarge

macOS-26 Intel

jobs:
  job:
    runs-on: macos-26-intel

jobs:
  job:
    runs-on: macos-26-large

Target date

Thursday, February 26th, 2026

The motivation for the changes

The images have passed the beta stage.

Possible impact

Please note the changes in the new images relative to Mac OS 15, which are listed in the beta announcements:

• macOS 26 (on Intel) is now available as a public beta in GitHub Actions #13637
• macOS 26 (Tahoe) is now available as a public beta in GitHub Actions #13008

Platforms affected

• Azure DevOps
• GitHub Actions

Runner images affected

• Ubuntu 22.04
• Ubuntu 24.04
• Ubuntu Slim
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26
• macOS 26 Arm64
• Windows Server 2022
• Windows Server 2025
• Windows Server 2025 with Visual Studio 2026

Mitigation ways

N/A

[xavier2k6]

@erik-bershel & team, Thank You! ❤️

[xavier2k6]

https://github.blog/changelog/2026-02-26-macos-26-is-now-generally-available-for-github-hosted-runners/

@erik-bershel macos-15-intel runner is available until August 2027, what date will the macos-26-intel be supported until?

[erik-bershel]

👋 @xavier2k6

Thank you for your kind words. ❤️

@erik-bershel macos-15-intel runner is available until August 2027, what date will the macos-26-intel be supported until?

Most likely it will match dates from macOS-14 plus two years: #13518
Which means July 2028 as deprecation point and November 2028 as decommission date. But we'll monitor the situation. The dates may change slightly. It's possible a decision will be made to keep the image in a deprecated state for a little longer to give Intel users more time.