Post author here, `__ulock_wait2` is used under the hood by `os_unfair_lock()`. I considered it but it would have required more scaffolding, especially to suppo

Post author here, `__ulock_wait2` is used under the hood by `os_unfair_lock()`. I considered it but it would have required more scaffolding, especially to support all the versions of macOS we care about. We might use it in the future though.