macOS is an operating system that can run for years without reinstalling. The symbiosis of hardware and software allows you to achieve the highest stability and speed of your computer. However, no one is immune from errors, and over time, macOS can start to malfunction – and this is especially noticeable after installing major updates. If errors cannot be corrected with improvised means, there is only one way out – a complete reinstallation of the operating system.

Reinstalling macOS is easy

There are two ways to reinstall macOS: via the online recovery mode or in the more traditional way – using bootable media.

Creating a bootable USB flash drive with macOS is a snap – you just need to follow simple instructions.

Note that you will need a Mac to create the bootable media. Unfortunately, this operation cannot be performed on Windows.

Where to start? The first step is to decide on the version of macOS and download the image to your computer. By the way, this can be done directly through the App Store.

Where to download the macOS image

macOS Mojave

macOS High Sierra;

macOS Sierra;

OS X El Capitan.

Creating a bootable USB flash drive with macOS

  • After downloading the image, we connect the USB flash drive to our Mac.
  • We give the drive a new name for convenience – USB. This can be done in the Finder context menu.
  • The next step is to launch the Terminal application through Spotlight or in any other convenient way.
  • Now, into the command line window, paste the command to copy the image to disk. The commands will differ depending on the OS version.

Mojave:

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

High Sierra:

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

Sierra:

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

El Capitan:

sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/USB --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app

  • After that, you will need to confirm the operation of formatting the drive – with the administrator password.
  • Depending on the speed of the drive, all the necessary data will be copied to the USB flash drive in 5-15 minutes. Everything is ready!

All that remains is to restart your Mac while holding down the Option key, select the drive, and begin installing macOS.

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