Resolved after 1 hour 33 minutes, on March 6, 2026.
### **Dates:** Friday, March 6th 2026, 21:38 UTC - 23:11 UTC ### **What happened:** During the incident timeline, customers running virtual iOS simulator tests on ARM or macOS ARM desktop tests in the EU Data Center were unable to start new sessions for either live or automated. ### **Why it happened:** There was a sequencing issue on the release of the ARM side disk images in the EU. ### **How we fixed it:** The image reference for the ARM side disk was rolled back to the previous reference to restore service. ### **What we are doing to prevent it from happening again:** The tests that run to validate the image syncing have been completed in each region.
Update timeline
- resolved Mar 06, 2026, 11:28 PM UTC
Between 21:38 UTC and 23:11 UTC, our virtual iOS and MacOS live and automated device tests were failing to start in the EU Data Center. We executed a deployment rollback, which restored services. All systems are now fully operational.
- postmortem Apr 10, 2026, 10:53 PM UTC
### **Dates:** Friday, March 6th 2026, 21:38 UTC - 23:11 UTC ### **What happened:** During the incident timeline, customers running virtual iOS simulator tests on ARM or macOS ARM desktop tests in the EU Data Center were unable to start new sessions for either live or automated. ### **Why it happened:** There was a sequencing issue on the release of the ARM side disk images in the EU. ### **How we fixed it:** The image reference for the ARM side disk was rolled back to the previous reference to restore service. ### **What we are doing to prevent it from happening again:** The tests that run to validate the image syncing have been completed in each region.
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