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Introduction

Créer une clé USB bootable pour Mac OSX El Capitan, Yosemite, Mavericks, macOS Sierra, macOS High Sierra et Mojave.

  1. Téléchargez le fichier d'installation dans le Mac App Store Si vous voulez télécharger d'anciens fichiers d'installation que vous avez téléchargés, allez sur l'onglet "Achats".
    • Téléchargez le fichier d'installation dans le Mac App Store

    • Si vous voulez télécharger d'anciens fichiers d'installation que vous avez téléchargés, allez sur l'onglet "Achats".

    • Il est impossible de télécharger les versions antérieures de macOS ou Mac OSX sur le Mac App Store depuis la version macOS Mojave.

    I have previously downloaded this file, but it does not show up on my purchased list. Also tried Apple Support downloads, but they only have “Update” versions to download.

    Peter Simons - Réponse

    If, you’re on macOS Majove, it’s impossible to download previous versions of Mac systems. Excepted, macOS High Sierra but, I don’t know for how long.

    Anthony Fassler -

    If you have issues logging into the (App Store -> purchased) due to 2FA, get the code sent to your device and append it to your Apple ID password to log in

    Joe Verba - Réponse

    You can download older versions of the OSX. Here are the download-links (unfortunately an article in german, but you can find the download-links below):

    https://www.macwelt.de/a/high-sierra-sie...

    Gerrit - Réponse

  2. À la fin du téléchargement, quittez l'installation qui se lance automatiquement.
    • À la fin du téléchargement, quittez l'installation qui se lance automatiquement.

    • Cliquez sur Installer OS X puis Quitter installation d'OS X.

    Il est également possible de passer par le soft “DiskMaker” pour faire cette clé.

    Il est gratuit, le prendre en fonction de la version de l’OS.

    Frédéric LEGER - Réponse

    Merci Frédéric !

    La solution à ce problème peut être très simple, comme vous l'avez écrit.

    Câlins de Barcelone

    Hermes

    Hermes Serrano - Réponse

  3. Insérez votre clé USB dans le port USB de votre Mac.
    • Insérez votre clé USB dans le port USB de votre Mac.

    • Attention : votre clé va être formatée plus tard, veillez à ne pas avoir de données importantes dessus.

  4. Faites une recherche avec le Spotlight ou allez dans "Applications/Utilitaire" pour lancer le Terminal. Cliquez dessus pour lancer le Terminal. Cliquez dessus pour lancer le Terminal.
    • Faites une recherche avec le Spotlight ou allez dans "Applications/Utilitaire" pour lancer le Terminal.

    • Cliquez dessus pour lancer le Terminal.

  5. Dans le Terminal, insérez une des ligne de commande suivantes (Le nom du système d'exploitation est celui que vous voulez installer sur la clé. Pas celui du système de votre Mac) : Pour El Capitan : sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app
    • Dans le Terminal, insérez une des ligne de commande suivantes (Le nom du système d'exploitation est celui que vous voulez installer sur la clé. Pas celui du système de votre Mac) :

    • Pour El Capitan : sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app

    • Pour Yosemite : sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Yosemite.app

    • Pour Mavericks : sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Mavericks.app

    • Pour Sierra : sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app

    • Suite à l'étape suivante.

    • Remplacer le chemin "/Volumes/MyVolume" par celui de votre clé USB, Pour ce faire, supprimez le chemin actuel puis faites un glisser-déposer.

    • Si vous n'avez pas téléchargé le fichier depuis le Mac App Store, vous devez modifier le chemin du fichier qui ce trouve après "applicationpath".

    Are these referring to the OS you're making the bootable device for or the one you're making it from?

    Joshua Montzka - Réponse

    Looks like it is probably for the OS that you are installing.

    Joshua Montzka - Réponse

    Yes it's for the OS that you want installing on USB key.

    Anthony Fassler - Réponse

    Add ““ at start “/Applications/Install OS X El Capitan.app” and at end

    Bitsn Bytes - Réponse

    For High Sierra: sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\ Sierra.app

    Александр - Réponse

    definitely copy/paste there are spaces in the command that aren’t obvious in what you see in the instructions. Also, in the replacement of Volumes/MyVolume - only replace the word MyVolume with the name of your USB - this wasn’t clear from the instructions.

    If you need to change the name MyVolume you should copy/paste in pieces as you can’t go back and type over what you input in Terminal

    lch63 - Réponse

    what is the application path if I had not downloaded it from the Mac App Store because its not available? I downloaded it from an download-link, but the path is not showed. need help

    Zoran Borschak - Réponse

    The best way to make it, is to delete the path after sudo until —volume and to go in your installer with right click, select contents, go in folder Ressources and drag and drop createinstallmedia on your terminal after sudo. after that, check the space after sudo and before —volume.

    Anthony Fassler -

    Easiest way to carry this out is to rename your USB volume “MyVolume” before you do anything else. This lets you copy and pate the Terminal commands without worrying about getting every last keysrtoke and space correct.

    You can rename it to whatever you like afterwards.

    James Demers - Réponse

    Worth noting that this generates an installer volume. It won’t boot the Mac with a fully functional OS.

    James Demers - Réponse

  6. Pour High Sierra : sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\ Sierra.app Pour Mojave : sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Mojave.app
    • Pour High Sierra : sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\ Sierra.app

    • Pour Mojave : sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Mojave.app

    i keep getting a command not found message. I copied and paste and tried several times.

    Devern - Réponse

    For what OS ? I remind that, it’s for the system that you want install on your USB Stick not, the one that you’ve on your Mac.

    Anthony Fassler - Réponse

    Did not work I get a message that ot had to run on root

    Luis Suarez - Réponse

    For versions of Mojave 10.14 and higher, the proper command is:

    sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

    James Demers - Réponse

    I want install High Sierra on usb. Get this error

    “sudo: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia: command not found”

    Richard Littell - Réponse

    I get a “/Applications/Install macOS High Sierra.app does not appear to be a valid OS installer application.” error. What now?

    tsa - Réponse

    Me too! I cant install it on USB. I tried everything

    Jan -

    für die mojave version führt folgender befehl zu erfolg:

    sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/stick

    das usb medium in stick umbenennen oder den namen im befehl editieren zb in notizen

    Christian Razborsek - Réponse

  7. Après avoir modifier le chemin, appuyez sur la touche "Entrée". Saisissez le mot de passe de votre session.
    • Après avoir modifier le chemin, appuyez sur la touche "Entrée".

    • Saisissez le mot de passe de votre session.

    • Votre mot de passe ne s'affiche pas, mais il est bien là.

    • Appuyer sur "Entrée" après avoir saisi votre mot de passe.

    • Vérifiez le nom et le chemin de votre clé USB. Si c'est juste, tapez "y" puis "Entrée".

    • La création de la clé se lance, veuillez patienter jusqu'à la fin du processus.

  8. Le Terminal vous indique "Done". C'est que la création de la clé bootable a réussi.
    • Le Terminal vous indique "Done". C'est que la création de la clé bootable a réussi.

    • Vous pouvez maintenant démarrer sur votre clé en appuyant sur la touche "alt" lors du démarrage de votre Mac.

    Really great guide. Nicely laid out and easy to understand. Nice

    Alec Chandler - Réponse

    Overall iFixit guides are great. This one is just good. The instructions are clear and easy to follow. However they involve typing or cutting and pasting a lot of text. This is cumbersome and highly prone to typos, etc. there are several other sites where you can find instructions that talk about free apps that walk you through creating a bootable usb drive. Another one of them has a nifty trick of simply dragging the icon for the usb drive to the terminal window. So while these instructions are clear and work, there are les error prone ways to achieve the same result.

    Stephen - Réponse

    Pretty good guide, especially for a community member. Thanks

    Sam - Réponse

    I’d add that step 7 can take a while before you see any progress. I’d estimate five minutes (on a 2014 MBP writing to a thumb drive) before the 0% changes to 10%.

    gyorke - Réponse

    I’ve created the bootable USB drive with the El Capitan installer downloaded from the app store to my MacBook and successfully booted my 3,1 mac mini with it, but when I try to run the OS X installer I get a message to the effect that it ‘can’t be verified and may have been corrupted or tampered with’ and the process won’t continue. I’ve re-downloaded and tried twice, same thing….. Anyone have any ideas how to proceed?

    echoplex - Réponse

    I really appreciate this guide, as well as the person who took the time to put it together. Personally, the LAST thing I want is to add yet another app to a system when there is a way to do it myself without installing anything. But I am a hands-on kind of gal to start with, & I was a tech dept employee for several years in the school system (right around the time the schools began transitioning from Mac to PC :( )

    Thank you.

    spoiledrottenweilers - Réponse

Ligne d'arrivée

85 autre(s) ont terminé cette réparation.

Anthony Fassler

Membre depuis le 26/02/2015

4 210 Réputation

2 tutoriels rédigés

48 commentaires

if it is possible with power iso i have installed this one on my system. http://standaloneinstaller.com/download-...

kennieboezi - Réponse

You mean create a USB key from Windows ?

Anthony Fassler -

I'm thinking of using this method to revert back to an older os due to my mac slowing down with Sierra. Will I be able to install just Yosemite or el capitan? Without installing previous os upgrades? This way I can have a fresh mac book.

skylerzanth - Réponse

Hello,

Yes you can but with this method, we must make a clean install.

So, please sure you save all your data to another hard drive.

Anthony Fassler -

Réparer ma clé usb

Marc Pitchebai - Réponse

clé usb bloquée je cherche à réparer

Marc Pitchebai - Réponse

Comment réparer ma clé USB bloquée ?

Marc Pitchebai - Réponse

quelle solution trouver

Marc Pitchebai - Réponse

Hi, I made a USB bootable drive with el capitan on it. Everything worked fine. I replaced my old hdd with the guide from this site. My iMac is from 2007. But now when I try to boot my computer with the Usb drive while holding the option key I only get a grey screen with a cursor. Any ideas?

Matthias Caes - Réponse

Hi,

You must press the Option / alt key immediately after pressing the start button (no need to wait for the startup sound) and normally you can select your usb key.

Anthony Fassler -

That's what I do though. With all the other key combinations I end up with a blinking folder icon with a question mark. i have tried the vpram reset as well so the problem isn't my keyboard. Could it be the usb itself? Or some other problem? If I did something wrong during the hdd replacement I figure I wouldn't have gotten this far, no?

Matthias Caes -

So, it probably comes from the usb key. When you had done it is that the key had the name of the operating system?

If that is not the case then there was a problem when creating.

Try any other usb port though, it's not already done.

If it still does not work, it will be necessary to put back your old hard disk to be able to start your Mac and follow the tutorial above (be careful to respit spaces and characters in step 5).

And check by pressing "alt" that this works well before putting your new hard drive.

Anthony Fassler -

I used a PC to make the usb drive. Downloaded the installer from the App Store and then transferred it to a pic where I extracted the .dmg file from the installer. I used a programme called transmac. I will see if it is possible to make the usb on another Mac. I know the whole process of making the usb drive on a pc was a detour but I didn't really have any other options... Thanks anyway for the help. I'll post back with progress.

Matthias Caes -

Sorry about forgetting to post back. I did the whole procedure on the PC again and it turns out I skipped a step so it all worked eventually. Thanks again for all the help. I feel like my youth playing with LEGO Technics has somehow contributed for my success, but this site was wonderful in all its simplicity!

Matthias Caes - Réponse

It does not work for me.

MacBook-Pro-6:~ computer$  sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Mavericks.app

sudo: /Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia: command not found

MacBook-Pro-6:~ computer$

rafa-rafelito19 - Réponse

Hello,

Do you have Mavericks installer in Applications folder ?

Anthony Fassler -

For some reason, terminal will not install to my flash drive. Getting this back from Terminal.

“AudioPhductions:~ Clint$ sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app

Password:

sudo: /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia: command not found

AudioPhductions:~ Clint$”

cwagoner78 - Réponse

doh! Nevermind, I figured it out :P

cwagoner78 -

Can’t get terminal to find the El Capitan file. It is in my applications file.

wshifty - Réponse

Give a try on DiskMaker X if terminal failed. it is an application built with AppleScript that you can use with many versions of OS X/macOS to build a bootable drive from OS X/macOS installer program. The steps you can check out:

https://diskmakerx.com/whats-this/

https://www.uubyte.com/burn-dmg-to-usb.h...

Chris Gorden -

I have followed directions (trying to make a boot-able flash drive with High Sierra which was downloaded from Apple App Store and in my Applications folder, I am running El Capitan on my MacBookPro)

but get this in Terminal: “Untitled is not a valid mount volume”.

“Untitled” is the name of my 16GB USB flash drive, erased and configured as Mac extended journaled with GUID partition and renamed as “Untitled”:

any advice?

Alan Goldsworthy - Réponse

Hello,

Did you copy paste of the command line ? Because, the command line is case sensitive.

Anthony Fassler -

Hi there,

Question for you. The step 5 am I copying the os code on the computer I currently have active or am I selecting the one that I am trying to download for the computer I just replaced the hard drive for? I’ve tried both and keep getting errors.

Here is an example:

Audras-Mac-mini:~ audracarpenter$ sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/BlkBackup --applicationpath /Applications/Install\ macOS\ High\ Sierra.app

createinstallmedia: unrecognized option `--volume /Volumes/BlkBackup --applicationpath'

Usage: createinstallmedia --volume <path to volume to convert>

Arguments

--volume, A path to a volume that can be unmounted and erased to create the install media.

--applicationpath, A path to copy of the OS installer application to create the bootable media from.

--nointeraction, Erase the disk pointed to by volume without prompting for confirmation.

Example: createinstallmedia --volume /Volumes/Untitled

Audras-Mac-mini:~ audracarpenter$

Thanks!

audrajcarpenter - Réponse

Hello,

The step 5 is for OS that you install on USB key not for your actual OS.

Regards.

Anthony Fassler -

Hi Anthony, thanks for the response. Ok, so the example I posted above, I am trying to use for High Sierra, which is the one I downloaded from the app store. But I am getting arguments that it’s incorrect. Does anything stand out to you as to what I have posted above?

audrajcarpenter -

You’ve a problem with the path of your Volume.

Copy and paste the command line of tutorial because, there are spaces that are not very visible.

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

All symbol “@” are spaces.

Anthony Fassler -

Hi Anthony, thanks, but there is a space for each of them. I did just copy straight from the page. Any other thoughts what it could be?

audrajcarpenter -

So, format your USB key in format Fat32 with more simple name (UNTITLED) by disk utility.

Then copy and paste this command line :

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

Anthony Fassler -

Hi Anthony that worked! Thanks so much. QQ.. now that I have that drive, I’ve followed your instruction on installing on a new hard drive for a mac book pro 2010 but I’m getting a ‘This copy of the install mac0s high sierra application is damaged, and can’t be used to install macos.’

I’ve tried it twice, but still getting same issue. Do you have a how to around this that I can take a look at?

audrajcarpenter -

It’s an other problem, normally it's because of the time of your Mac that is not fair.

if, you have booted on the usb key. So, you have to set the time of your mac.

So, before click on install macOS, go to utilities/Terminal, enter this command line “date mmddHHMMyy” and change the lettre by the actual date.

mm=mouth, dd = day, HH=hour, MM=minute and yy = year (example = date 0824113518)

Anthony Fassler -

How long should the installer files take to load onto the USB? I’m currently copying El Capitan onto a 16gb USB, the file is only 6.something Gb and it’s already taken longer than 20 minutes…

Katrina Evitts - Réponse

It’s written above Time Required 30 minutes - 2 hours.

It depends on the speed of the usb.

Anthony Fassler -

so easy … its making me paranoid.

Rick Carter - Réponse

this procedure does not work for os x mountain lion, right?

Gianluca - Réponse

Hello,

Unfortunately no

Anthony Fassler -

After I enter it all, I get a comment that says “ /Applications/Install macOS High Sierra.app does not appear to be a valid OS installer application.” Any ideas why this might be?

Russell Greenberg - Réponse

Hello,

Do you have the file in your application folder ?

If yes, the command line you entered is incorrect. Copy and paste is the better option.

Anthony Fassler -

Thanks for you sharing ,i don't know if any of you have ever used Rufus and WizISO ,(Free and fee tools that can be used to do the same thing )

https://rufus.ie/en_IE.html

https://www.iseepassword.com/create-boot...

poasmer - Réponse

I’ve noticed a lot of people having issues so here is what I done first open terminal and type sudo then a space then go to your OS X app (should be in the application folder) and right click then choose show package contents after that a new Finder window will open double click Contents then Resources and find a file called createinstallmedia and drag it into your terminal window then type a space then “--volume” space then drag then name of your flash drive (should be listed on desktop) to the terminal window then type space then “--applicationpath” space then drag the installer app (should be in the application folder) to the terminal window then hit enter type your password hit enter “y” to confirm then enter

Dakota Miller - Réponse

Thank you very much for sharing this, it worked flawlessly!

laporta.fra -

Will I be able to re-use the USB drive after installing Mac Os?

Christian Truchsess - Réponse

Yes of course, after a formatting of your USB drive

Anthony Fassler -

How much storage do I need on my USB Drive to get the software on it?

Andrew Lim - Réponse

You need USB drive with 8GB minimum

Anthony Fassler -

so i notice this in the terminal what does it mean?

WARNING: "--applicationpath" is deprecated in macOS 10.14 and greater. Please remove it from your invocation.

Andrew Lim - Réponse

Apple improved it’s function with the new macOS Mojave and greater as said above, the function work but, without the part “—applicationpath”.

So, remove this part and try again, normally it should work.

Anthony Fassler -

Thank you! for the help

Andrew Lim -

is there any easy solution other than text commands?

Chris Gorden - Réponse

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