Hi Wil,
Thanks for your reply.
Yes, this is on 10.12.6 (Sierra) so, unexpected.
I did not see com.apple.quarantine after running xattr -l, where in the output text would I expect to see that? I tried searching for "quarantine"in the terminal window after the xattr -dr, but didn't get any hits.
Any thoughts for confirming the issue is kext not loading? - or - perhaps I am better off upgrading to High Sierra?
Thanks,
Art