Fix/solution for "Selected Mac OS X Installer is incomplete"

A real solution for those who get stuck at STEP 1.

Seeing no real solutions offered here on the forums, other then seeing users getting pushed to look at the troubleshooting guide for UniBeast 8 and then coming back empty handed because they are stuck at:

8. If your "Install macOS High Sierra.app" is less then 5 GB, then it's the partial installer and will not work with UniBeast.

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The troubleshooting guide won't supply users with a fix and users getting all...

Fix/solution for "Selected Mac OS X Installer is incomplete"