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Level 1

8 points

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

I give up!! - I've followed the instructions (to the letter!) for every version of the OSX installers - and ALL are working fine, EXCEPT for SIERRA!! -- Every troubleshooting attempt I can think of results in the same Terminal error; "/Volumes/MyVolume is not a valid volume mount point" -- HELP!!

Before you ask, YES - I have named my destination drive "MyVolume" - and YES, I know it is case sensitive...

I've wasted too much time researching this -- and I know there are a ton of others having the same issue - but no resolution so far...

anyone??

Mac Pro, macOS 10.14

Posted on Nov 1, 2019 6:41 PM

Best reply

hamoja

Level 1

13 points

Posted on Nov 2, 2019 11:30 AM

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.

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

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