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[macOS] Xcode 27 is now available as a public preview #14404

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[macOS] Xcode 27 is now available as a public preview#14404
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v-AndriiKhyliuk
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AnnouncementArea: XcodeOS: macOS

Description

@v-AndriiKhyliuk
v-AndriiKhyliuk
opened on Jul 16, 2026

Edit 2026.09.16

xcode-27 image now uses MacOS 27 OS as its base OS.

Breaking changes

macOS 26 with Xcode 27 is now available for GitHub Actions.
You can use the xcode-27 image label in your YAML to select this image.

jobs:
  jobName:
    runs-on: xcode-27
jobs:
  jobName:
    runs-on: xcode-27-xlarge

The image is marked as "preview" for now. It means some software can be unstable on the new platform.
Also, there could be queueing issues as the capacity will be balanced only throughout the next weeks.
Please report any problems with the new image to this repository.

Target date

Thursday, July 16, 2026

The motivation for the changes

The purpose of a Preview is to collect feedback on an image before it is released to GA.
The goal of a Preview is to identify and fix any potential issues that exist on that image.

Possible impact

N/a

Software difference between macOS 26 and macOS 26 with Xcode 27

Tool name macOS 26 macOS 26 with Xcode 27 Notes
Xcode
  • 26.6
  • 26.5 (default)
  • 26.4.1
  • 26.3
  • 26.2
  • 26.1.1
  • 26.0.1
  • 27.0 (beta) (default)
 Base Xcode major release changed to Xcode 27
Xcode Build
  • 17F113
  • 17F42 (default 26.5)
  • 17E202
  • 17C529
  • 17C52
  • 17B100
  • 17A400
  • 27A5218g
 Updated to Xcode 27 beta build
Xcode app path
  • /Applications/Xcode_26.6.app
  • /Applications/Xcode_26.5.app
  • /Applications/Xcode_26.4.1.app
  • /Applications/Xcode_26.3.app
  • /Applications/Xcode_26.2.app
  • /Applications/Xcode_26.1.1.app
  • /Applications/Xcode_26.0.1.app
  • /Applications/Xcode_27_beta_3.app
 Use the image-specific default path
Xcode symlinks / aliases
  • /Applications/Xcode.app -> Xcode 26.5
  • Version aliases for installed 26.x builds
  • /Applications/Xcode_27.0.0.app
  • /Applications/Xcode_27.0.app
  • /Applications/Xcode.app
 Xcode.app points to Xcode 27 by default
SDKs shipped with selected Xcode 26.x generation SDKs (from Xcode 26 line)
  • macOS 27.0
  • iOS 27.0
  • tvOS 27.0
  • watchOS 27.0
  • visionOS 27.0
  • DriverKit 27.0
 SDK generation is bumped with Xcode 27
Simulator runtimes 26.x simulator set
  • iOS 27.0
  • tvOS 27.0
  • watchOS 27.0
  • visionOS 27.0
 New simulator generation available

Known issues:

  • Included Software: and Image Release: links in Set up job step will be fixed on next image rollout

Platforms affected

  • Azure DevOps
  • GitHub Actions

Runner images affected

  • Ubuntu 22.04
  • Ubuntu 22.04 Arm64
  • Ubuntu 24.04
  • Ubuntu 24.04 Arm64
  • Ubuntu 26.04
  • Ubuntu 26.04 Arm64
  • Ubuntu Slim
  • macOS 14
  • macOS 14 Arm64
  • macOS 15
  • macOS 15 Arm64
  • macOS 26
  • macOS 26 Arm64
  • Xcode 27
  • Windows Server 2022
  • Windows Server 2025
  • Windows Server 2025 with Visual Studio 2026
  • Windows Desktop 11
  • Windows Desktop 11 with Visual Studio 2026

Mitigation ways

Please report any problems with the new image to this repository.

Activity

  1. v-AndriiKhyliuk
    added
    Announcement
    Area: Xcode
    OS: macOS
    on Jul 16, 2026
  2. v-AndriiKhyliuk
    changed the title [-][macOS] macOS 26 with Xcode 27 is now available as a public beta[/-] [+][macOS] macOS 26 with Xcode 27 is now available as a public preview[/+] on Jul 16, 2026
  3. v-AndriiKhyliuk
    pinned this issue on Jul 16, 2026
  4. v-AndriiKhyliuk
    changed the title [-][macOS] macOS 26 with Xcode 27 is now available as a public preview[/-] [+][macOS] Xcode 27 is now available as a public preview[/+] on Jul 16, 2026
  5. v-AndriiKhyliuk
    self-assigned this
    on Jul 22, 2026
  6. cad0p
    added 2 commits that reference this issue on Jul 24, 2026

    ci: parallelize UI tests via build-once-fanout matrix, xcode-27 runne…

    ae22342

    ci: parallelize UI tests via build-once-fanout matrix, xcode-27 runne…

    6c93552

  7. cad0p commented on Jul 24, 2026

    @cad0p
    cad0p
    on Jul 24, 2026

    Hi, I noticed this error while trying it out:

     /Applications/Xcode_27_beta_3.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator27.0.sdk/Developer/Library/Frameworks -DXcode
 error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain

    Is this a known issue that the metal toolchain is not included yet in the image?

  8. WikipediaBrown
    added a commit that references this issue on Jul 30, 2026

    ci: run SDK-dependent jobs on the xcode-27 image

    39ce63a
  9. darth-sipid
    added a commit that references this issue on Aug 1, 2026

    ci: forward-compat CabalmailKit + app-layer tests on xcode-27 preview

    fbc541c

  10. marcolg97 commented on Aug 11, 2026

    @marcolg97
    marcolg97
    on Aug 11, 2026

    With the new one-major-Xcode-version-per-image model, how are minor Xcode updates handled? Will the image roll forward automatically (e.g. 27.0 → 27.1) with no way to stay on the previous minor, or will it be like before, where the xcode-27-xlarge image contains multiple Xcode versions?

  11. davidwkeith
    added a commit that references this issue on Aug 16, 2026

    ci(#855): add non-required Swift 6.4 compile lane on xcode-27 image (#…

    39fbb6e
  12. i386
    added a commit that references this issue on Aug 26, 2026

    ci: use GitHub-hosted xcode-27 label for runner_macos_apple

    af0b2ea

  13. 51 remaining items

  14. sudoHG
    added a commit that references this issue on Oct 7, 2026

    feat: report pinned toolchain health and possible changes (#123)

    110d191
  15. jaywedgeworth22
    added 2 commits that reference this issue on Oct 7, 2026

    ci(ios): build and ship on GitHub-hosted xcode-27 image, pinned to Xc…

    e0aa383

    ios: persist Xcode 27 project settings and iOS 27 deployment floor in…

    3a6687c
  16. clvsh
    added 4 commits that reference this issue on Oct 8, 2026

    ci: add a macOS 27 arm64 lane on the xcode-27 runner

    7f86604

    ci: add a macOS 27 arm64 lane on the xcode-27 runner

    6874d0a

    ci: add a macOS 27 arm64 lane on the xcode-27 runner

    4bfbdc6

    ci: add a macOS 27 arm64 lane on the xcode-27 runner

    024015d
  17. ladislas
    added a commit that references this issue on Oct 8, 2026

    Add macOS 27 to os matrix with xcode-27

    2fdd467
  18. kubaflo
    added a commit that references this issue on Oct 9, 2026

    Adopt Xcode 27 for .NET 11 Apple builds (#39262)

    939f53f
  19. nirs
    added a commit that references this issue on Oct 15, 2026

    test: Lint on macOS 27 (xcode-27)

    b901aa5
  20. djbclark
    added a commit that references this issue on Oct 20, 2026

    release CI: build the bottle on xcode-27 (macOS 27), not macos-latest

    1b9c210
  21. AllDmeat
    added a commit that references this issue on Oct 21, 2026

    Switch CI to Xcode 27 (#230)

    a1c8377
  22. LorcanChinnock
    added a commit that references this issue on Oct 22, 2026

    ci: build on Xcode 27 so releases include Copy Alt Text (#815)

    79eab32
  23. baldyeagle
    added 2 commits that reference this issue on Oct 23, 2026

    CI: use the xcode-27 runner image; create build dir before tee

    04e9928

    Add CLAUDE.md, CI workflow and default-browser plist checklist (#2)

    a5f30d2
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