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minorArchivedCircleCIvXcode 26.6.0, macOS M4 Pro large resource class

CircleCI: Delays starting macOS jobs that use Xcode 26.6.0

  1. Investigating(done)
  2. Trending(skipped)
  3. Workaround available(skipped)
  4. Resolved(done)
  5. Archived

Executive summary

Since approximately 14:00 UTC, macOS jobs using Xcode 26.6.0 on the M4 Pro large resource class have experienced delays starting, with wait times reaching up to 30 minutes. The issue has been resolved since 15:11 UTC.

No verified workaround yet

This incident was resolved upstream without a reported workaround.

Technical root cause

Under active investigation. No report has identified a root cause yet.

Evidence

1 report · 1 StatusShow
  1. [1]
    Status First report
    Delays starting macOS jobs that use Xcode 26.6.0(opens official status page in a new tab)

    Investigating: Since approximately 14:00 UTC, customers running macOS jobs that use Xcode 26.6.0 on the M4 Pro large resource class are experiencing delays starting jobs. Wait times have reached 30 minutes or more. Thank you for your patience while our engineers investigate. We will provide another update by 15:30 UTC. Identified: Delays starting macOS jobs that use Xcode 26.6.0 have recovered. Since approximately 15:11 UTC, macOS jobs that use Xcode 26.4 are experiencing delays starting, with…

    by circleci status

Timeline

  1. First report on status page

    Delays starting macOS jobs that use Xcode 26.6.0

    Source
  2. Official statement

    Investigating: Since approximately 14:00 UTC, customers running macOS jobs that use Xcode 26.6.0 on the M4 Pro large resource class are experiencing delays starting jobs.

    Source
  3. Status changed

    Status changed: new → archived (resolved more than 14 days ago).