How To Make a Bootable USB Install Drive for macOS Sierra 10.12.
Video Screencast Showing How To Create a USB Boot Disk Installer for macOS Sierra 10.12 Developer Preview.
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TRANSCRIPT:
In this episode, How To Create a macOS Sierra 10.12 Developer Preview USB Boot Disk.
Straight to the Demo. Soooooooo, Let’s Get Started.
Let’s First Begin With The Prep Work:
1. You’re logged in with an Admin account on your Mac.
2. You have at least an 8 GB blank USB 2.0 or 3.0 Disk.
3. Have a copy of macOS Sierra 10.12 Developer Preview Installer and that it’s located in the Applications folder.
A free Public Beta Preview will be available for download via. Apple’s Public Beta Program in July.
And when officially released this fall, macOS 10.12, will available from the Mac App Store as a free download.
4. Open TextEdit and make document as plain text.
5. Copy and paste the following one line Terminal command, which I’ve included in the description of this video, in the text document:
sudo /Applications/Install\ 10.12\ Developer\ Preview.app/Contents/Resources/createinstallmedia --volume /Volumes/NameOfUSBDisk --applicationpath /Applications/Install\ 10.12\ Developer\ Preview.app --nointeraction
Now, with all the prep work taken care of, let’s begin creating the USB Boot Disk.
Insert your USB Disk in an available socket and note the name. In my case, the name of the USB is “USB1”.
From the text document created earlier, replace “NameOfUSBDisk” with the name of your USB Disk.
Final Steps: Open Terminal and copy and paste the one line Terminal command from the text document, followed by carriage return.
You’ll then be asked to enter your Admin Password and after pressing carriage return, the creation of the macOS 10.12 USB Boot Disk Installer will begin.
I’ll just time-lapse it from here.
In My Case: Using a USB 3.0 disk, it only took just under 2 minutes to complete. And for a USB 2.0 disk, it took just over 30 minutes to complete.
And that’s all there is to it.
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Thanks and Peace.
Download macOS Sierra for Free from the Mac App Store when released this fall or if you have a paid Developer License, Download Now from Apple's Developer Website or wait till July to download Public Beta Preview.
Useful Links for USB 3.0 Flash Drive Used in this Demo:
Lexar 32 GB USB 3.0 Flash Drive:
Amazon US: http://goo.gl/pdErGe
Amazon Canada: http://goo.gl/S2rJBN
Amazon UK: http://goo.gl/rWWlUT
Performed and Tested On MacBook Air (13-inch, Mid 2012) on Lexar 32GB USB 2.0 JumpDrive P10. Using OS X El Capitan 10.11.5 and macOS Sierra Developer Preview 10.12
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