I have a MacBook Pro 2016 15" with 256GB running macOS High Sierra. When I got the MacBook used, I was able to log in. The MacBook did not have an iCloud account linked so I linked mine up and enabled Find my Mac.
I tried to do a fresh install of macOS Sierra which cleaned out the hard drive but it says "An error occurred while preparing the installation. Try running this application again".
Disk Utility returns a code 8 for a corrupted system. Is this because I did not turn off the Find my Mac?