How to Create a macOS Installer on a USB Drive (The Ultimate Guide!)

Опубликовано: 19 Май 2026
на канале: Apple Caffè
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*WARNING Please read this description carefully (by clicking "SHOW MORE") to get all the information and links needed for the steps described in the tutorial, to create the macOS installer (any operating system from Catalina to El Capitan) on a USB stick:

Here are the links to download the operating system, in case you don't find it available on the Mac App Store:

Direct link to download macOS Mojave: https://apps.apple.com/it/app/macos-m...
Direct link to download macOS High Sierra: https://apps.apple.com/it/app/macos-h...
Direct link to download macOS Sierra: https://apps.apple.com/it/app/macos-s...
Direct link to the El Capitan download: http://updates-http.cdn-apple.com/201...

Here are the codes to paste into Terminal, depending on the operating system you want to install on the USB drive:

Catalina:* (copy the code string from the word "sudo" to "MyVolume")
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

Mojave:* (copy the code string code from the word "sudo" to "MyVolume")
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

High Sierra:* (copy the code string from the word "sudo" to "MyVolume")
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

El Capitan: (copy the code string from the word "sudo" to "MyVolume")
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app

Below is a link to the tutorial for performing a clean install of macOS (you can easily Follow only from the point where the USB drive has already been created):    • macOS Mojave: cos'è l'installazione Pulita...  

Here's the link to the tutorial for replacing an old hard drive with an SSD (solid state drive):    • Come sostituire l'hard disk del Mac con SS...  

Here's the guide for backing up your entire Mac and then restoring its data:
   • BackUP e Ripristino del Mac con Time-Machi...  

I dedicate this very laborious (and very complex) tutorial to all those who, despite the fact that over the last 7 years I've always made specific videos for every new Apple operating system, continue to have problems and doubts about them. So I thought to myself: why not make a tutorial that works for any operating system released by Apple in the last 5 years? Here it is! This is the DEFINITIVE GUIDE to creating automatic installation software to be stored "forever" on an external memory (USB stick or hard disk or whatever), the installation software for any operating system from Mojave to El Capitan, without the need to use third-party applications.