^^^^I also had installation issues, installing the Final Release over PB6. My post from another thread:
Interesting, I upgraded over PB6 on a laptop with no issue.
Seems fine so far. Consistently though Safari has a hinky-jinky thing going on in text boxes (small matter). Overall feels zippier, probably because of the clean interface. Love the dark look, absolutely love it.
Having trouble (not Mac Pro related) getting Android Studio and IntelliJ to run. It wants me to install a legacy JDK from Apple and won't recognize the JDK 8 I have installed. More Java hate from Apple here.
VMware is running just fine.