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Document: WM-018 P. Webb
Category: Tutorial 2017.11.03
APFS preboot install issues no more!
Abstract
Spoiler alert, Time Machine is trash.
Body
I was minding my business one day (October 27th) and I thought, oh!
What's this? A "recommended update"? "Oh sure, I'll update to macOS
High Sierra Beta 5, while I wait to pre-order my iPhone X at 3am."
Updating my OS is something I've done *countless* times before. Apple
waits until 1~3am to let me know there's a software update or just
performs one while I'm asleep. I awake the following morning to find
my computer more secure than it was the previous day. Guess what
happened this time? On the day of my friggin' *marriage* (at 2am)?
I glance at my computer and see a software update…stuck. No worries,
I'll reboot! Okay, Recovery Mode! Also, Restore from Time
Machine…wtf? Why the hell did it stop at 39%? *opens logs* Can't find
linker for CoreSomethingOrOther? Good grief, reboot! Ghostbusters
logo in white, sans ghost. WHAT. THE. FUCK. I open the Apple Support
app, choose my laptop from my devices list, and chat with a rep.
After confirming I didn't want to book a Genius Bar appointment on my
wedding day, I shut down my computer and went to bed in a huff (I
prefaced my availability and was still asked…bruh).
Fast-forward a few days and I'm talking to a nice Genius about my
computer issue (and Nintendo Switch, he's trying to justify buying
one). He performs many of the same things I did to try and get my
computer to work. Lo and behold, my computer lives! It breathes! It
scrolls the wrong direction by default (Natural Scrolling is WRONG,
you *heathens*)! I eagerly head home to perform a three-hour restore
from my Time Machine.
1. I done goofed
I went through the same recovery process I've done days prior.
What did I see? GHOST. BUSTERS! Managed to get into Recovery Mode
to try for the last time, restoring via Time Machine, even though
I knew it would end in error. First though, I should reformat the
drive with Apple's File System (APFS)…*Could not create a preboot
volume for APFS install*. Welp. Time to fire up the iPad to search
for solutions.
2. Salvation
After scouring the Internet for some *semblance* of a solution, I
stumbled upon a post[1] on Apple's own support forums by a user
named Ethoic. Here is that post in full:
> Right Mac users. If your facing the same problem like me then I
> suggest you listen up. First don't try to install Mac OS high
> Sierra again or try anything else. You want to first of delete
> your drive until you have no drive. Yes I mean no drive. To do
> this, power off your Mac and then hold Command + R and boot up
> your Mac. This should do the trick. Then delete your drive in
> disk utility by clicking the minus button on the top right and
> then enter internet recovery mode by repeating the process
> though this time adding option and then command + R. Then you
> will enter the same menu which is mac os utilities and then this
> time instead of Mac OS High Sierra you will just see Sierra. Go
> disk utilty and create a disk this time clicking + and make a
> drive calling it Macintosh HD with the format Mac OS Extended.
> The fix is your removing the APFS system which is what is
> confusing the drive which for some reason apple can't figure out
> them self. Then just click install Mac OS and you should be good
> to go. Hope your all good and ask anything you need.
Let's break that down into steps for ease of reading:
1. Don't try to install macOS High Sierra again.
2. Delete your drive until you have no drive. Seriously.
- Power off your Mac and then hold the `Command + R` keys
while booting.
- Delete your drive in Disk Utility. You should only see the
macOS Recovery Drive. *Leave this alone.*
3. Reboot Mac and hold down the `Option + Command + R` keys to
activate Internet Recovery mode. Oh yeah, you'll need wifi.
Make sure you're connected.
4. You should see a drive in Disk Utility. If you don't see a
drive and are unable to click the little plus button to create
one, reboot until you do…this was a little weird for me, might
not happen to you.
- If you do see a drive, reformat it as "Mac OS Extended" and
call it "Macintosh HD".
- There are a couple options for "Mac OS Extended". If you have
a Time Machine backup you want to keep, know that you should
choose "Case sensitive" if you setup your OS to be case
sensitive (as an example).
5. Initiate Internet Recovery.
6. Once the recovery is successful, use Migration Assistant to
restore from a Time Machine backup.
Restoring from Time Machine from scratch has NEVER worked for me and
seemingly, 99% of the Internet. Absolute trash IMO. I'm glad I got my
data back but jeez. So many hours of my life wasted because of this
issue. And the productivity loss (but Super Mario Odyssey *gains*)!
Oh, and I'm not on the macOS beta anymore, haha. Other folks who have
the same issue didn't seem to be on a beta OS but you can never be
too sure.
If you are currently on a macOS beta and would like to hop off
that train[2]:
> On `System Preferences → App Store` you have an option called "Your
> computer is set to receive pre-releases Software Update seeds", use
> the button `Change` and select `Do Not Show Pre-release Updates`.
Hope this helps! 🕸
References
[1] <https://discussions.apple.com/thread/8106654>
[2] <https://superuser.com/a/845520>
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