Add Xcode 16.4

[vanvoorden]

Tool name

Xcode 16.4

Tool license

Apple

Add or update?

• Add
• Update

Desired version

16.4

Approximate size

No response

Brief description of tool

Apple released a macOS 15.5 RC and Xcode 16.4 beta. This probably means Xcode 16.4 is released soon. Do we have any ETA on adding Xcode 16.4 to the macOS runner images?

Would we have any reason to believe adding 16.4 would mean deleting an older version like 15.4 or 16.0?

URL for tool's homepage

No response

Provide a basic test case to validate the tool's functionality.

Platforms where you need the tool

• Azure DevOps
• GitHub Actions

Runner images where you need the tool

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

Can this tool be installed during the build?

Tool installation time in runtime

No response

Are you willing to submit a PR?

No response

[ijunaidm1]

Hi @vanvoorden - We will look into the issue and update you on this ticket issue.

[wangyum]

+1. It seems 16.4 fixed this issue:

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/string_view:300:42: error: implicit instantiation of undefined template 'std::char_traits<unsigned char>'

https://developer.apple.com/documentation/xcode-release-notes/xcode-16_4-release-notes

[ijunaidm1]

Hi @wangyum - We will be removing Xcode 15.4 from macOS15 images , there is an announcement ticket created for "removing Xcode15.4 " #12195.

[NachoSoto]

Any updates here?

[ijunaidm1]

@NachoSoto - We are currently in the process of the image deployment and with this week's image deployment ,
Xcode16.4 will be added to macOS15 runner images.