I have tried to install Oracle database into a number of Guest operating systems including Windows 7, Windows 10 and Centos. There always seems to be a problem when the installer gets to the Oracle Network Config step. I have tried all the different network config options within Parallels without any success. There must be something which is causing the problem and I can't believe I'm alone with this problem. I am running Parallels 11 on a MacBook Pro 15 (wifi only) using OS Sierra. I did try the same install some time ago when I was running Yosemite and EL Capitan with no success.