CircleCI incident: Increased wait times for macOS jobs on m4pro.large

Affected components

• macOS Jobs

1. resolvedOct 20, 2026, 18:14 UTC

   Wait times for macOS jobs on the m4pro.large resource class have returned to normal. We thank you for your patience while the backlogs cleared.

2. monitoringOct 20, 2026, 17:31 UTC

   Wait times for macOS jobs on the m4pro.large resource class are recovering. Jobs using Xcode 27.0 are now waiting about ~3.5 minutes on average, down from about ~40 minutes at the peak. Jobs using Xcode 26.6 and 26.4.1 are still working through a backlog, which is clearing. Wait times on m4pro.medium are normal. We will share another update soon as we continue to monitor.

3. monitoringOct 20, 2026, 17:02 UTC

   Wait times for m4pro.large are still elevated due to heavy large demand. All m4pro.medium are normal. We're actively monitoring, we appreciate patience.

4. monitoringOct 20, 2026, 16:32 UTC

   Customers running macOS jobs on the m4pro.large resource class are still seeing increased wait times, with some jobs waiting up to 30 minutes to start. We're continuing to monitor this and will share another update shortly.

5. investigatingOct 20, 2026, 15:58 UTC

   We're seeing increased wait times for some macOS jobs using the m4pro.large resource class. We're investigating and will provide another update soon. Thank you for your patience.

What APIStatus.watch saw

• Oct 20, 2026, 16:00 UTCoperational → degraded
• Oct 20, 2026, 18:15 UTCdegraded → operational

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How often does CircleCI have incidents?

CircleCI reported 23 incidents in the last 90 days, 3 of them major or critical. A typical incident lasted 1h 26m. See CircleCI's uptime and incident history