Missing/Wrong Clang versions on macos runners

[Flamefire]

Description

macos-13 is supposed to have

Clang/LLVM 14.0.0
Clang/LLVM (Homebrew) 15.0.7 - available on $(brew --prefix llvm@15)/bin/clang

However /usr/bin/clang++ resolves to

Apple clang version 15.0.0 (clang-1500.1.0.2.5)

macos-15 should have

Clang/LLVM 16.0.0
Clang/LLVM (Homebrew) 18.1.8 - available on $(brew --prefix llvm@18)/bin/clang

/usr/bin/clang++ resolves to

Apple clang version 17.0.0 (clang-1700.0.13.5)

InstalledDir: /Applications/Xcode_16.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Is that a documentation issue or a setup bug? Or am I missing anything?

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 22.04
• Ubuntu 24.04
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

Image: macos-13
Version: 20250908.1476

Image: macos-15-arm64
Version: 20250928.2397

Is it regression?

no

Expected behavior

Default (Apple)Clang version matches documented version

Actual behavior

Different version reported

Repro steps

Run clang++ --version in a job on the macos-* images

[Alexey-Ayupov]

Hi @Flamefire , we will take a look.

[erik-bershel]

@Flamefire 👋
Yes, thanks for noticing. We clearly have some kind of bug in the documentation generation scripts—we need to check it out. We won't be fixing it for macOS 13, but we need to fix it for the rest.