Create a Bootable USB Sierra Installer in Mac OS X 10.12

Create a Bootable USB Sierra Installer in Mac OS X 10.12

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**Sierra is not advertised on the Mac App Store any longer. It’s available but hidden.
To find it, check out this video:

**Check out our latest video for Mac OS Mojave 10.14 at:

**Check out our updated video for Mac OS X High Sierra 10.13 at:

This video shows you how to create a bootable USB Flash Drive Mac OS X Installer. You will be able to boot most Macs from it and then install Mac OS X 10.12 Sierra without needing to re-download the installer for each Mac. You can also use it to format the internal drive of a Mac using the built in Disk Utility, this is also covered in the video.

You will need a 8GB or larger USB Flash Drive (aka USB key). Make sure it’s empty, because you’ll be deleting everything on it during the process of making the installer.

You will use a command in the Terminal. Make sure you type it correctly, or you will get an “unknown command” error. Here is the command for your reference:

sudo /Applications/Install macOS –volume /Volumes/SierraBootInstall –applicationpath /Applications/Install macOS –nointeraction &&say Done

If you have any questions or suggestions for new tutorial videos you would like us to post, please put them in the comments below.

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welcome to Tips & Tricks gemsbok is an applic consultant helping you with all of your Apple hardware and software needs today we're going to build a USB installer you'll be able to boot from this USB flash drive and install Mac OS 10 Sierra on most Macs now you need the installer in your Applications folder so you'll see here we don't have an installer so the first thing you need to do is go to the App Store and it's download the Mac OS Sierra installer it's free so you should be able to download it easily typically you'll download it and then it will open and you'll run the installer here we're going to do things a little bit differently so you see the download started here we can check it in the launchpad it's a large download of course over 4 gigs so it'll take a little while to run okay the download is finished and we have our installer so typically you'd hit the continue button here run the installer but we're going to quit and we'll quit the App Store as well we just need the Installer to be sitting in our Applications folder so if we open a window here go into applications then we can see the install application is sitting right here we're going to use this to build our USB installer flash drive so we need to use terminal for that so we'll go into utilities and go into terminal and this is where we're going to enter the command I put the command in a description for your reference but we're going to go through it here in the video as well the next thing to do is to put in your USB flash drive so here we've got our drive now the important thing is that it is 8 gigabytes or larger so here we see the system it's an 8 gig drive but its systems reporting 7.75 and the next thing we need to do is to format it and give it a name so we're going to choose the flash drive here hit erase choose the Mac OS extended journaled option and we're going to give it the name Sierra boot installer or install so I see our boot install so you have to remember this name we're going to actually use this name in the command so we're formatting the USB here and when we mount on the desktop with the name Sierra boot install great we will quit disk utility and we have our flash drive named correctly so we're going to go back into terminal here and here is where we can enter our command we'll enter the command here using sudo or subdue so go slash applications slash install mac OS Sierra you hit the tab key here and it autocompletes that contents /resources slash space – – volume space slash volumes slash sierra boot install which is the name of the flash drive we just put in space – – application path space slash applications and this is where we point it to the Installer that we downloaded slash install hit the tab it will autocomplete space – – no interaction space ampersand ampersand say and then enter it may ask you for your password here you'll erase the disk on the flash drive and copy the installer files to it so it's important you don't have anything out on there it's really should be a brand new USB flash drive because it's going to wipe out everything that's on there ok it's copy that all of the install files there this is done here in the terminal so now we're ready to use this it's ready you can use it on most Macs and if we open it we can see that the install files here and then there's also a secret boot partition that we can use to actually boot a Mac so to do that you insert your flash drive start your Mac hold down the option key and you'll see we have your option to boot from your hard drive or now from the actual USB key so we're booting from the USB key here pardon all the dust on the screen and it comes up to the Installer so in this case we're going to use the Disk Utility to format the internal hard drive of this computer before we run the installer so we open up Disk Utility and you can see all the disks that are in place so in this case we're choosing the internal drive and we'll give it a name we'll just call it Macintosh HD at the drive it's done it's a flash drive so it goes really quickly now we quit Disk Utility here and that will put us back into the Installer window choose install mac OS click continue and you can run through the installed process it will pull all the files off the heart of the flash drive rather than pulling them down from the internet so you're in installs will be much quicker especially if you have to do multiple installs or you want to keep the key around from maintenance when you run through this process here you don't have to be worrying about using vlog data from your internet connection or the speed of loading everything so in this case the install process is much much quicker and now we have a fully installed system ready to be used I hope you found this tutorial useful I put the command down in the description if you found it useful please give it a thumbs up if you have any questions or comments put them in the comment section below and as usual please like comment subscribe and share

33 Replies to “Create a Bootable USB Sierra Installer in Mac OS X 10.12”

  1. 1945bill3

    For some unknown reason, I could not enter my password into Terminal. After trying 9 times, I finally quit and will try to use the process without using a password. If others have similar problems with not being able to enter their password into terminal, perhaps the producer of the video may or should address this problem.

  2. Kevin Resnover

    It possible to also partition the drive instead of erasing when ready to install so that I can use both Sierra and High Sierra?

  3. Victor Araneda Jure

    Hey thanks, every other tutorial I saw skipped the part about formatting the new SSD. This tutorial was super useful.

  4. CleanDark Lair

    How do I download to macOS Sierra because I have been searching this app and I can’t find it.or any operating system beside OS Mojave. Thank you

  5. whanauli

    Hi, Can you explain why you chose APPLE SSD SM05… rather than Macintosh HD to format ? I saw some other tutorials choose Macintosh HD. Thanks,

  6. William Lane

    This saved my marriage! Big shoutout to the potato of wisdom. Nothin gets me emotional like a bootable USB sirra installer. Its like I'm back in college with the boys again.

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