Wednesday February 1st 2023, 12:25 - 13:55 UTC
Customers experienced elevated wait times for virtual devices running a specific macOS version for the duration of the incident.
An unusual spike in demand for a particular macOS version caused starvation for this virtual device type. The Mac cloud running macOS and iOS suffers from device starvation when there are large spikes in demand. In this particular case, we saw not only a spike in requests for devices in our Mac cloud but also for a specific version of macOS which led to elevated wait times.
During these incidents, we can only wait for our Mac cloud to catch up with the demand.
We continue to look at ways to increase our Mac cloud in both our US and EU regions. In the short term, we are rebalancing the OS versions we have pre-booted and ready to be allocated to tests based on recent usage.