Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

Tamagotchi

macrumors 6502
Original poster
Jun 13, 2013
369
412
To make a bootable USB installer, format a USB to OSX Extended (journaled) naming it Untitled, download the developer preview...

Then type the following on terminal:

sudo /Applications/Install\ 10.12\ Developer\ Preview.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ 10.12\ Developer\ Preview.app --nointeraction

Cheers
 
  • Like
Reactions: Lunder89

antmarobel

macrumors 6502a
May 8, 2009
519
144
Brasília
Not working for me. I tried 3 times and evreytime the install fails. Does anyone know how to do it with Disk Utility method?
 

DeltaMac

macrumors G5
Jul 30, 2003
13,607
4,496
Delaware
What is a "Disk Utility method"

You do need to verify that the terminal command is typed correctly.
Even better, copy and paste from a site that has the correct command, and one that you know works. I did try the following yesterday, and it works fine. Here is the working boot setup for your convenience. Do not type this yourself, it's really easy to misstype, miss extra spaces, etc. - just copy and paste the full command.

You should note that this is for the Public beta, and not for the developer preview, as listed by the OP...

You also need to be sure that the installer app is in the Applications folder, which is where the download from the App Store is normally placed.
Name your external USB flash drive or partition as SierraInstaller, then copy and paste the following text in the terminal:
Code:
sudo /Applications/Install\ macOS\ Sierra\ Public\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/SierraInstaller --applicationpath /Applications/Install\ macOS\ Sierra\ Public\ Beta.app --nointeraction &&say Done
Wait until "Done" is listed when the command is finished. It can take more than 30 minutes, so be patient.
 
Last edited:

tedson

macrumors 6502
Jul 17, 2002
262
190
For the public beta use this instead:

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

Where the name of your thumb drive is "Sierra"
 
  • Like
Reactions: DeltaMac

antmarobel

macrumors 6502a
May 8, 2009
519
144
Brasília
For the public beta use this instead:

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

Where the name of your thumb drive is "Sierra"

That was exactly what I did tedson.
http://osxdaily.com/2016/06/15/make-macos-sierra-beta-usb-boot-drive/. But, like I said, 3 fails (iMac Retina 27 late 2014 running Sierra already, but developer version, downloaded here and there you know.
 

DeltaMac

macrumors G5
Jul 30, 2003
13,607
4,496
Delaware
The reason the command will fail is when the command is not correct or complete.
That's why you need to copy-and-paste one that is correct.

Do you always get the same error when it fails?
 

antmarobel

macrumors 6502a
May 8, 2009
519
144
Brasília
The reason the command will fail is when the command is not correct or complete.
That's why you need to copy-and-paste one that is correct.

Do you always get the same error when it fails?

Haha problem solved DeltaMac. Thanks for trying to help!!! :)
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.