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: high sierra install issue

tried installing High Sierra update and getting a flashing folder with a questionmark, computer will not start

MacBook Air, iOS 11.1

Posted on

Reply
Question marked as Apple Recommended
Answer:
Answer:

That means your Mac cannot find a valid system folder to startup from.

About the screens you see when your Mac starts up - Apple Support

Boot into Recovery and reinstall Mac OS.

About macOS Recovery - Apple Support

Posted on

Page content loaded

Question marked as Apple Recommended

Nov 11, 2017 7:06 AM in response to chicagoexport In response to chicagoexport

That means your Mac cannot find a valid system folder to startup from.

About the screens you see when your Mac starts up - Apple Support

Boot into Recovery and reinstall Mac OS.

About macOS Recovery - Apple Support

Nov 11, 2017 7:06 AM

Reply Helpful
User profile for user: chicagoexport

Question: high sierra install issue