Tech Shop pro Mac OS X Sierra DVD Installer repair reinstall install support via amzon messges Free

The instructions for this DVD were inaccurate - the instructions were for a flash drive, and the keystrokes to install from the DVD are different. After getting directions from Apple Support for booting from the DVD drive, the installation stopped with a circle and slash (stop sign) every time, with or without internet connected. The instruction page had a YouTube website for install help that didnt work because the account was terminated. The instructions also said to email the seller, but there was no email address. After retrying the installation several times, I was able to install the Mac OS using a flash drive purchased from another seller. Returned to Amazon for a full refund.