I had posted a note earlier with little feedback so I thought I would post HOW TO INSTALL High Sierra on VMware Workstation 12.5.7
It is much easier than the complicated scripts that I have seen.
Assuming that you have a functioning macOS system:
1) On your existing macOS, go to the App Store and download the High Sierra installer. Some people have reported that a stub installer is only downloaded although this has not happened to me. If it happens to you, follow the instructions on this page: http://osxdaily.com/...erra-installer/
2) The easy way to create a bootable USB is to use Install Disk Creator. It has been updated for High Sierra: https://macdaddy.io/...l-disk-creator/
Using a Terminal window, you could use the command:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Note: Replace "MyVolume" with the name of the macOS volume of your USB key
3) Create a new Virtual Machine in VMware Workstation. Select "Apple Mac OS X" as the Guest O/S and "macOS 10.12" as the version.
Select the default for all other options (although I prefer to have the virtual disk as one single file)
4) Edit the newly created VMX file and append the two following lines:
smc.version = 0
sata0:0.virtualSSD = "1"