Home > Computers, Technology > Mac Won’t Boot After High Sierra Upgrade, ugh.

Mac Won’t Boot After High Sierra Upgrade, ugh.

broken_apple_mac

It is a Mac. It is supposed to just… work! One of my friends came to me with an issue. They had a perfectly good Macbook… I think it was a 2014 or 2015 model, aluminum unibody, gorgeous of course. It was working just fine until they updated it to OS X High Sierra and then it just wouldn’t boot. They let it run for hours but it would just stay at the loading screen with the grey background, Apple logo, and a progress bar that would fill completely, but the OS (operating system) just would not start.

I followed all the instructions in this article to no avail. I ran the disk checkup, I cleared the NVRAM, I did an internet recovery (which is a super awesome concept). I even tried to reinstall the OS using internet recovery and for whatever reason it wanted to reinstall OS X Lion, which is not what we want.

Luckily, in my side hustle I run a small business of computer repair and stuff, which is how I post all my secrets here. I have a small collection of OS X install files that I was able to gather just for this purpose! Lo and behold, I have a High Sierra install file (the legit one, not one from some sketchy website). I obtained this install file from a working Mac previously by downloading it from the App Store and not installing it and copying it to external media.

I am a Windows person and when you reinstall Windows you are taking a chance that it is going to write over top of a lot of your personal stuff, and you will lose it. I didn’t know if Mac OS did the same, so I made sure to make a backup of my friends personal files to an external hard drive. I took out the hard drive, connected it to a hard drive reader, and connected that to another Mac and was able to copy all of his files to a backup location, just in case.

The next thing I had to do was use that same working Macbook to create a bootable USB version of High Sierra since the bad Mac was not starting. I downloaded the application Install Disk Creator and used that to create the bootable USB High Sierra update. You could also create the bootable USB drive via command line stuff in Terminal, but that takes time and patience and a lot of correct typing. I will just use the app.

After putting the High Sierra install files and installing Install Disk Creator, I created the bootable USB drive, connected it to the Mac, turned it on and immediately held down the Option button and was able to select the USB drive. Once it loaded I selected to Install High Sierra and it started, and ran, and ran, and I started playing Horizon Zero Dawn, and it continued installing with me looking to make sure the progress bar was moving… and it was… and FINALLY, it loaded up a very custom screen with a picture of my friend and his wife which told me the install happened without deleting all of his files. HOORAY!

All in all, it wasn’t bad, but I wanted to run through the whole list of options before resorting to reinstalling the OS if it didn’t have to happen because I didn’t want to risk losing his files. In the end, I learned when reinstalling Mac OS X it doesn’t erase your files! I’m just glad I didn’t have to pull the nuclear option and completely erase the drive as I have previously discussed, because that would be annoying.

Categories: Computers, Technology
  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: