We're seeing a large number of reports of Macs randomly locking up and beachballing a couple times a day: the user can move the cursor around and click on apps (which can be repositioned) but can't actually do anything.
This started happening with the 10.9.5/Yosemite release timeframe and only affects 10.9.5 and 10.10, with freshly imaged as well as upgraded systems, and we have not been able to pin it on anything. I'm wondering if we are the only folks running into this issue, which would help us with our troubleshooting. Is anyone seeing something similar? Logs are not showing anything useful.