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3 Steps to Clean Install macOS

Step 1. Tải về macOS...

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Full steps

Step 2. Create the bootable installer after...Full steps

Step 3. Install macOS from the bootable...Full steps

To upgrade và install the latest macOS update on your Mac machine, you can easily get it within the system"s Software Update option. That"s no problem. But sometimes, we may require a clean install of a macOS version for hardware/software troubleshooting, or khổng lồ be able khổng lồ install the same macOS system on multiple devices at the same time. In this regard, you need khổng lồ install macOS from an external drive or USB. 

Some Basics of macOS install from a bootable USB Drive

Installing a Mac operating system in this way can be challenging, as the whole process is involved with the application of Terminal command lines and creating a bootable installer. Nonetheless, we"re trying lớn make the entire procedure simple to lớn follow, và ensuring you not make mistakes. Now let"s begin with some of the most frequently asked questions that many users are trying lớn get an answer.

Q1: Why bởi vì you install macOS from USB?

The benefits of installing macOS from USB compared with the automatic software update option include:

It"s for clean install so you can get rid of junk apps và files that are piled up on your Mac.It"s useful to troubleshoot the Mac startup issues, fix corruption, or recover files.It can save time và effort when you need to install macOS on multiple systems and machines.

Q2: How vì chưng I create a bootable installer for macOS?

All the available installer can be found on the Mac App Store, including macOS Monterey, macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra and OS X El Capitan. You need to lớn create the installer using correct Terminal commands for different macOS versions. 

Q3: Can I install macOS from USB without the internet?

A bootable installer doesn"t download macOS from the internet, but it does require an internet connection to lớn get firmware & other information specific to the Mac model.


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Step 1. Tải về macOS

Click the tải về link for the desired macOS version you want to lớn install.

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Each macOS download is going to lớn send khổng lồ the Applications folder as an tiện ích named Install macOS . If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please tải về from Apple, not a locally hosted software-update server. 

Pay attention. OS X El Capitan is quite different from the other five. This tải về is presented in a disk image format named InstallMacOSX.dmg.

Step 2. Create the Bootable Installer After Download

First of all, a vacant 16GB USB drive is essential. If you want lớn use an old USB drive for installation, make sure that you"ve copied the data and saved it as a backup. The installer creation process will format and erase all data on the external USB khổng lồ take effect. Also, the USB drive needs formatting as Mac OS Extended (HFS+).

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Connect the external USB drive lớn your Mac. It"ll be used for the bootable installer. Next, we"ll arrive the most important part of applying the "createinstallmedia" command in Terminal to lớn create the bootable installer for the following six operating systems.

In the Finder, find the Applications/Utilities folder, then double-click Terminal.Each macOS installer needs an exclusive command line in the table. We suggest you copy one of the following commands & paste it in Terminal. (You may require to replace MyVolume in all the command lines with the real name of your own USB flash drive.)


sudo /Applications/Install macOS --volume /Volumes/MyVolume

Big Sur:

sudo /Applications/Install macOS Big --volume /Volumes/MyVolume


sudo /Applications/Install macOS --volume /Volumes/MyVolume


sudo /Applications/Install macOS --volume /Volumes/MyVolume

High Sierra:

sudo /Applications/Install macOS High --volume /Volumes/MyVolume

El Capitan:

sudo /Applications/Install OS X El --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El

After typing the command in Terminal, press Return khổng lồ enter the command. Afterward, it"s time to respond all the confirmation warnings by tying Y, including confirming erasing the USB volume, approving the Terminal to access files on the volume and allowing the copy to lớn proceed.

After all the operations are complete, the USB drive will have the same name as the installer you downloaded such as Install macOS Monterey. Quit Terminal và disconnect the USB drive. You should then move on to the final installation procedure now.

Step 3. Install macOS from the Bootable Installer

To boot Mac from the bootable USB drive, the operation varies from the Intel-based Macs & Apple Silicon-based Macs. 

Intel MacsApple Silicon Macs
2020 27-inch iMac2019 Mac ProThe overall requirements of 3DS2018 Mac miniMacBook Pro (14-inch, 2021)MacBook Pro (16-inch, 2021)iMac (24-inch, M1, 2021)Mac mini (M1, 2020)MacBook Air (M1, 2020)MacBook Pro (13-inch, M1, 2020)
1. Press & hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.2. Release the Option key when you see a dark screen showing your bootable volumes.3. Select the volume containing the bootable installer. Then click the up arrow or press Return. 4. Choose your language, if prompted.5. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.1. Turn on your Mac & continue to hold the power nguồn button until you see the startup options window, which shows your bootable volumes.2. Select the volume containing the bootable installer, then click Continue.3. When the macOS installer opens, follow the onscreen instructions.

Closing Words

The three steps to download macOS, create a bootable installer to an external USB & then clean install macOS from USB should be clear and simple to follow. The process requires you khổng lồ use the Terminal command lines to erase the USB drive, format it with a proper file system, and save the installer to lớn it. Though the chance is little, use hard drive recovery software khổng lồ recover files while reinstalling macOS. Data Recovery Wizard for Mac

Recover lost or deleted files, documents, photos, audio, music, emails effectivelySupport data recovery for sudden deletion, formatting, hard drive corruption, vi khuẩn attack, system crash under different situations
 Download for MacmacOS 12.0 - 10.9  Also Available for Windows