> Maybe macOS on Azure is running slower and we should just increase the timeout?
(Aside, why don't the macOS buildbots have a tag saying that? Took me ages to find them...)
I doubt it's running 6-7x slower. More likely something is causing one of the workers to crash at a point where the lock remains held instead of being released (I saw this at work the other week in a slightly different context, but same symptoms).
Could os._exit() at the wrong time cause it?
It also looks like Azure is running tests with 4 processes, but the buildbot (at least the one I'm looking at) is only using 2. So perhaps there are more conflicts from that?