After installing macOS High Sierra, you should revert CoreStorage on your hard drive and doing so is as simple as running a command in the Terminal.
diskutil cs revert /
When done, save your files and restart the system. If you get the following message, then you are most likely on High Siera or someone else may have run the invocation earlier.
/ is not a CoreStorage Logical Volume
The following two tabs change content below.
About The Author:
Stephan Pringle is an Information Technology Support Specialist. He covers hardware
and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York
on his Hackintosh
and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.