Maintenance Window
We are experiencing intermittent issues with iOS Simulators and MacOS desktop browser tests in our US-West data center, caused by a third-party service disruption. Our engineering team is actively coordinating with the provider to restore full service.
2025-December-17 Resolved Service Incident
Incident
Report for Sauce Labs
Postmortem
When it happened:
Wednesday, December 17th 2025, 10:37 UTC - Thursday, December 18th 2025, 11:59 UTC
What happened:
Applications were unable to be downloaded via Mobile App Distribution for a subset of customers.
Why it happened:
A product change combined with an increased and sustained load resulted in higher resource usage than anticipated, exceeding established limits for certain clients.
How we fixed it:
The service was rolled back to a stable version.
What we are doing to prevent it from happening again:
There are multiple improvements planned.
- Improved monitoring & alerting,
- Enhanced post-deployment validation
- Capacity planning forecasting
- More advanced communication where possible ahead of major changes
- Adding canary to the roll out process
Resolved
Between 10:37 UTC December 17th and 11:59 UTC December 18th, we were experiencing issues downloading applications via Mobile App Distribution. This issue has been resolved. All services are fully operational.