Macos 26.4+ update

Ecosystem CircleCI Images
1

We’re using .circleci/config.yaml with xcode: 26.4.0 and were expecting macos to be updated up to 26.4 or newer as well, but it still uses 26.3.1 even for 26.5: https://circle-macos-docs.s3.amazonaws.com/image-manifest/v18380/manifest.txt

The problem is, for flutter workflows, since macos 26.4 release, the rendering system have changed, and therefore all the goldens tests are failing. This issue is out of scope for flutter, and the only sane way to resolve is to update runner’s OS version: Goldens images changed after upgrade to macOS 26.4 · Issue #184182 · flutter/flutter · GitHub

We would like to either see the way to change the macos runner version, or bind the runner version with xcode version.

2

Our team are also blocked by this and have no means of rolling back our MacOS systems to 26.3. MacOS is now at version 26.5 and CircleCI is using 26.3.1… As a result, we have to push changes and wait for CI to generate/update the goldens, which adds significant turnaround time to what should normally be a fast local workflow.

This is starting to have a noticeable impact on development velocity and confidence in our test pipeline.

Others are impacted by this too ~ Xcode 26.4.1 Released - #10 by OliverNarramore

Hopefully CircleCI can rapidly release a fix for this or even offer a preview image to unblock us.

3

My team is struggling with the same thing, is there any workaround we can use in the meanwhile?