Announcement: Upgrade to macOS Mojave

With features like Dark Mode, Stacks, and four new built-in apps, macOS Mojave helps you get more out of every click. 
Find out how to upgrade to macOS Mojave > https://support.apple.com/macos/mojave

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Question:

Question: MacOS High Sierra

I am trying to reinstall MacOS High Sierra but I get an error message unable to upload as lost preboot volume for APFS install, do any of you know how I can sort this out?

MacBook Air, OS X Yosemite (10.10.3)

Posted on

Reply

Page content loaded

Mar 16, 2018 3:14 PM in response to nicolafromtiverton In response to nicolafromtiverton

How to download macOS High Sierra

Install El Capitan or Later from Scratch


If possible backup your files.


  1. Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
  2. Select Disk Utility from the Utility Menu and click on Continue button.
  3. When Disk Utility loads select the volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase icon in Disk Utility's main window. A panel will drop down.
  5. Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Install OS X and click on the Continue button.


This will install the version of OS X you had installed.

Mar 16, 2018 3:14 PM

Reply Helpful
User profile for user: nicolafromtiverton

Question: MacOS High Sierra