Build failures Xcode 26.4.0

Summary

Build failures Xcode 26.4.0

Customers running macOS jobs on m4pro.medium and m4pro.large with the xcode:26.4.0 image experienced job rejections with the error: "Job was rejected because resource class <class name>, image xcode:26.4.0 is not a valid resource class". The issue has been resolved and affected jobs should now run normally. Customers whose jobs failed may rerun affected jobs. We thank you for your patience while our team worked on implementing a fix.

• Started

  Apr 24, 2026 · 5:25 PM

• Resolved

  Apr 24, 2026 · 6:36 PM

• Duration

  1h 11m

• Severity

  Minor

• ◆

  Identified

  Apr 24 · 5:25 PM CircleCI

  There are build failures for Xcode 26.4.0; we have identified the issue and are currently implementing a fix.

• ◉

  Monitoring

  Apr 24 · 6:01 PM CircleCI

  A fix has been implemented and we are monitoring the results.

• ✓

  Resolved

  Apr 24 · 6:36 PM CircleCI

  Customers running macOS jobs on m4pro.medium and m4pro.large with the xcode:26.4.0 image experienced job rejections with the error: "Job was rejected because resource class <class name>, image xcode:26.4.0 is not a valid resource class". The issue has been resolved and affected jobs should now run normally. Customers whose jobs failed may rerun affected jobs. We thank you for your patience while our team worked on implementing a fix.