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Running Parallels 18, just tried installing from my newly formatted usb disk. Ran fine and was able to login to Chrome OS Flex when running from...
Sadly, mine did not get resolved so simply. I have been waiting on a resolution by the development team.
I have also just installed 15 on a new Macbook Pro with a new Windows 10 product key / new install and have no internet ... BUT I do have internet...