I give up!! - Terminal error; "/Volumes/MyVolume is not a valid volume mount point" -- HELP!!

WORKAROUND FOR CREATING BOOT MEDIA FOR SIERRA

KNOW ERRORS SINCE OCT24th 2019

- “not a valid volume mount point” when creating a USB boot disk

- Unable to create a boot media due to expired OSX certificates Oct 24

FIX PREREQUISITES [New installation verified]

- Ensure disk format as GUID/Extended Journaled

- Reinstallation on APFS may result failure such as “no native error to verify installinfo.plist"

Follow steps in order noted:

- Download new Sierra release with certificate fix here:

http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg

- Run “installos.dmg” and extract InstallOS.pkg

- Install “InstallOS.pkg” on a MAC complaint computer. Installation only verifies compliance and copies installer to application folder.

- Rename “Install macOS Sierra.app” to “Install macOS Sierra.app.NEW”

- Search google to find old release of Sierra prior to Oct 24 2019

• Old Sierra file name should remain as “Install macOS Sierra.app”

NOTE Both old and new software installers must be installed in the Application folder:

YOU MUST START WITH THE OLD VERSION OF SIERRA, NOT NEW FOR CREATING BOOT DISK

• Open terminal
• Change volume to match your setup and paste command into terminal window:
• sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app
• Enter password for sudo
• if you get the message “To continue we need to erase the disk at /Volumes/MyVolume” If you wish to continue type (Y) then press return”

-

STOP, STOP AT THIS POINT DO NOT TYPE “Y” OR “YES” to continue

NEXT TWO STEPS ARE MOST IMPORTANT IN GETTING TRICK TO WORK:

• RENAME “Install macOS Sierra.app” to “Install macOS Sierra.app.OLD”
• RENAME “Install macOS Sierra.app.NEW” to “Install macOS Sierra.app”

- NOW YOU CAN ENTER “Y” TO CONTINUE WITH THE BOOT DISK CREATION

• if you wish to continue type (Y) then press return: y

=================================================

Erasing Disk: 0%... 10%... 20%... 30%...100%...

Copying installer files to disk...

Copy complete.

Making disk bootable...

Copying boot files...

Copy complete.

Done.

BarryVedros wrote:

The reason I want to install Sierra is that I installed High Sierra and the graphics are crap.

Mid-2010 MBP

Is it the look of the icons and interface or is it graphical/GPU issues?

If the latter and you have a 15" or 17" model you are likely encountering the known GPU issues associated with this laptop due to a hardware issue. If this is the case you can force the laptop to use the Intel GPU instead by using gfxCardStatus utility.

If the issue is just the cosmetic look of High Sierra, then you can install an earlier pre-Sierra version of macOS until Apple fixes the Sierra USB installer, then install the Sierra upgrade. To install an older version of macOS you have two options:

• Use Internet Recovery Mode (Command + Option + Shift + R) to install the original version of macOS which shipped with the laptop
• Create a bootable macOS 10.11 El Capitan USB installer (make sure to read all the directions for El Capitan as it involves a few more steps now)

I wasted the entire day trying to create a Sierra boot disc. How does Apple have a version of the Sierra installer that actually works for creating a bootable disc? I mean, especially when they have an entire page dedicated to it, and linking to a version of the Sierra installer specifically for that reason? This is exactly what's wrong with Apple these days...

hamoja, where did you get that info from? Thanks for posting that—within 15 minutes I have a working, bootable Sierra installer again. Appreciate the post.

okay, should have included this last time; first ls (command above) shows the directory, this will show the volume...

ls -aled@ /Volumes/MyVolume

The mount point looks okay, now whether that volume is mounted?

Getting older releases is becoming much more difficult, too.

That countermeasure is too involved. For those users who have the old pre Oct 24 version of Sierra, just use it to run the create install once done copy the post Oct 24 new version of Sierra and it ready to go.

SOLVED!!!

I have been working for 8 hours+ and someone in the internet said the new installer was missing files. So I copied from an old installer (4.9GB) to the new installer (5.01). Try installing both of them maybe install the old one first and then rename it, then install the new one, Go to applications folder right click "show package contents" open "Contents" of old installer, copy files. Do the same with new installer but instead of copying you paste and override the files. Then run your script in terminal.

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Volume --applicationpath /Applications/Install\ macOS\ Sierra.app

(Volume is the name of my external hard drive or could be your flash drive)

The old installer is here: http://176.9.47.213/themacgo/macOS_Sierra_10.12.1.dmg?md5=pRYVhmXwKESElwkxHWxmLg&expires=1574820354

The new installer is here: http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg

Yep, the first link isn't Apple-official. And that's the bigger problem with Apple releasing yet another broken piece of software. It's not just that they couldn't release a functional installer—now we have people having to find random "old" versions of the installer from non-Apple sources. Who knows what's going on with those installers? Brutal.

Narihiro wrote:

btw, could you please provide any old version os download link here?

Load High Sierra, if at all possible. Any Mac that’ll run Sierra will also run High Sierra, and the latter fixes various issues with the former.

HWTech

Thanks so much for the help. I downloaded the app but still having issues in both Intel and Nvidia modes. I have a mid-2010 MBP that I'm trying to keep in service. Went from El Capitan to High Sierra before checking for known issues and got bit by the graphics bug. I'm told that going down to Sierra will fix it. So I've been prepping a USB install to do that - NOT AN EASY TASK - thanks Apple. The icons and desktop seem to be ok, it's gfx artifacts in graphics programs like Pixelmator and all web sites in Safari and Chrome. Mostly what I use this one for.

Thanks

Barry

I know nothing about this option:

https://github.com/julian-poidehttps://github.com/st

But the person who updated gfxCardStatus recommends the solution for 2010 MBPro as mentioned on this page:

https://github.com/steveschow/gfxCardStatus

What have you tried?

What is the createinstallmedia command you’re using?

What’s located at that path, if anything? Use:

ls -aled@ /Volumes

Tried rebooting, and trying the command again?