I’m gonna have to do more testing, but I was trying to run the ZB4R6-p2… installer… on my new mac pro… with 10.9.2 and just got a beach ball, don’t think the installer would launch, nothing to force quit. Wasn’t a gatekeeper, issue… right-clicked the installer, open, to give it permission to run. Just nothing happened. 
OK, not sure what was going on the other day. But I tried the installer again today and it worked fine on 10.9.2. I did copy the installer from mounted dmg to the desktop this time to avoid any permissions issues. Perhaps I was just not patient enough, and expect everything to be immediate with the pci-e SSD.