Outage in Circle CI
Increased wait times for macOS jobs on m4pro.large
Resolved MinorIncident Report
Summary AI Generated
CircleCI experienced a 2.3-hour period of significantly elevated queue wait times for macOS jobs on the m4pro.large resource class, with some jobs waiting up to 40 minutes to start due to high demand. Xcode 27.0, 26.6, and 26.4.1 workloads were all affected, while m4pro.medium instances remained unaffected throughout. Wait times gradually recovered as backlogs cleared, returning to normal by 18:14 UTC on October 20, 2026.
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.
Components affected
Circle CI macOS JobsTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
4 days ago - at 10/20/2026 06:14PM
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.
MONITORING
4 days ago - at 10/20/2026 05:31PM
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.
MONITORING
4 days ago - at 10/20/2026 05:02PM
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
4 days ago - at 10/20/2026 04:32PM
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.
INVESTIGATING
4 days ago - at 10/20/2026 03:58PM
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.
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