'latest-stable' intermittently pulling xcode-beta 26.0 on macos-15 runner

[bryce-b]

I'm using latest-stable for xcode-version in my github action, but xcode 26.0.0 is getting pulled instead.
This issue seems to be intermittent, I've re-run some jobs that have failed with this issue, and they suddenly start pulling Xcode 16.4.0

https://github.com/open-telemetry/opentelemetry-swift/actions/runs/17679200996/job/50251762496

https://github.com/open-telemetry/opentelemetry-swift/actions/runs/17679200996/workflow#L47-L49

[bryce-b]

The intermittent issue may be due to a partial runner update, but it appears xcode 26.0 was marked GM, which is considered stable here

setup-xcode/src/xcode-utils.ts

Line 55 in 7f352e6

return licenseType.includes("beta") ? "Beta" : "GM";

Should this be the case?

[brunoald]

This affected me as well. I had to manually select Xcode 16.4 so my build would work.

[Owen1212055]

Can confirm as well, would certainly be nice to either have this fixed or an alternative label be introduced. 😄

[ethicnology]

xcode latest is version is 26, if you want to freeze to 16 you can specify:

    steps:
    - uses: maxim-lobanov/setup-xcode@v1
      with:
        xcode-version: 16.4

[maxim-lobanov]

GitHub Actions team just finished rollout of new image with Xcode 26.0 (17A321). This Xcode version is stable (RC). So, it is expected that this action selects it when you use xcode-version: latest-stable.

To explain the "intermittent" behavior:
GitHub Actions team can't update all VMs immediately (because it will cause macOS VMs downtime). So, they update VMs slowly and usually it takes 2-3 days. During this period, your workflows can be randomly assigned to VMs with new image or old image