Now, 6 hours passed, it's still black and no display on the screen. This morning when I was editing a Word document, suddenly my Mac turns off and tries restarting. 'I recently installed macOS 10.13, High Sierra version on my MacBook, no problems while updating. The macOS data recovery software provided on this page can be applied to restore lost data on the latest macOS 11 (Big Sur), macOS 10.14 (Mojave), 10.13 (High Sierra), 10.12(Sierra), and old Mac OS X 10.11/10.10, etc. PAGE CONTENT: Recover Lost Data from macOS High Sierra Update Recover Data when Mac Hard Drive Won't Boot