How To Clean Install macOS High Sierra For Mac [Guide]

clean install macos high sierra final on mac

In this step-by-step guide you will learn how to clean install macOS High Sierra on Mac desktop or laptop devices using the easy way.

After months of testing macOS High Sierra features during beta testing phase, Apple has finally rolled out the final version of its highly anticipated desktop OS for public. If you chose to stay away from beta releases until the full final version gets released with all bugs and loopholes plugged by Apple, now is the time to get to work and install full macOS High Sierra v10.13 on your iMac, MacBook, Mac Pro, Mac Mini, MacBook Air, and other compatible devices.

Actually there are a couple of way you can use to install the new update on your Mac. If you want quick installation then get it from your Mac’s app store via OTA update method. But if you prefer a clean, fresh start with no chances of errors and bugs, then clean install on your iMac or MacBook is the best option. Since clean install requires a bit more effort than the OTA update, you may want to be careful while following this method. There is no need to worry as we have explained a complete method to clean install macOS High Sierra on Mac in a step-by-step guide below. You can follow this tutorial whenever you wish to clean install macOS High Sierra for removing viruses, to fix an issue or to get a fresh start on your Mac.

Prerequisites:

How To Perform Clean Install of macOS High Sierra on Mac

Step 1 – First and foremost, download macOS High Sierra 10.3 final version update that Apple has pushed to the Mac App Store. This is very important.

download macos high sierra 10.13 update for mac

Note: If you haven’t downloaded a version of macOS or OS X previously, then the Mac App Store will initially download an installer and then initiate the process. Wait for the installer download to complete after which you can exit the install process as we are going to perform clean install using the steps below.

Step 2 – Once the installer is downloaded, you are going to need to to create a Bootable USB flash drive for fresh install of macOS High Sierra on your Mac. You can follow the steps in our guide here: How To Create Bootable USB Installer for macOS High Sierra.

Step 3 – When the bootable USB flash driver installer is ready, you need to plug it with your Mac.

Step 4 – Next, boot your Mac while keep pressing the Option key during the boot up process. Make sure USB installer remains connected with to your computer during boot process.

Step 5 – This will take you to a new menu with several options on the menu to choose for booting up your device. Here, you need to select the plugged in bootable USB drive from the list and hit enter key to continue.

Step 6 – Now wait as the system to runs various checks and processes to get the device ready for OS installation. When complete, you will see a macOS Utility menu. Here, select Disk Utility from the available options and hit the Continue button to proceed.

Step 7 – As the main Disk Utility gets loaded, make sure that the main Mac hard drive is selected on the left hand side, and the click on Erase button. Make sure in the Name field, title of the HDD remains “Machintosh HD”, and in Format field “Mac OS Extended (Journaled)” is selected. Now hit the Erase button.

Step 8 – This will wipe out the current installation from your Mac. Then, you will be presented with another macOS Utilities menu. This time, select Install macOS and hit continue button.

Step 9 – In the next screen, click on Continue button, ensure that Machintosh HD is selected, and then hit Install.

Step 10 – That’s it. Wait for the macOS High Sierra to complete set up process by registering files and other important data on your Mac.

After the final automatic reboot you will have a clean macOS High Sierra installed on your Mac or MacBook. Enjoy Apple’s new desktop operating system with all its amazing new features and improvements.

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