Circle CI incident
Increased wait times for macOS jobs on m4pro.large
Circle CI experienced a minor incident on October 20, 2026 affecting macOS Jobs, lasting 2h 15m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Oct 20, 2026, 03:58 PM UTC
We're seeing increased wait times for some macOS jobs using Xcode 27.0 on the m4pro.large resource class. We're investigating and will provide another update soon. Thank you for your patience.
- monitoring Oct 20, 2026, 04:32 PM 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.
- monitoring Oct 20, 2026, 05:02 PM 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.
- monitoring Oct 20, 2026, 05:31 PM 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.
- resolved Oct 20, 2026, 06:14 PM 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.