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How to Clean Install the macOS High Sierra?


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Want to clean install macOS High Sierra

Upgrading to the latest Mac operating system released at the Apple keynote this September can be everything you envisioned and more. If you take the time to upgrade it properly, that is. How? By performing a clean install of the macOS High Sierra.

Don’t worry, a clean install is as easy as it gets and we’ve prepared a comprehensive guide to have you upgraded and performing at maximum, in no time. But first, let’s find out why the new operating system brings to the table in terms of new, exciting features. Afterwards, we’re going to give you a complete clean install guide which you’re actually going to enjoy!

Why you should upgrade to High Sierra

MacOS High Sierra’s features are a series of elegant refinements that will improve performance and user experience, while also paving the way towards virtual and augmented reality. Here are the best upgrades:

  • Safari gets faster and smarter, offering multiple customization options for users
  • The file system is now more secure, with built-in encryption and crash-safe protection
  • Videos look more amazing than ever, while taking with 40% less space in storage
  • The Photos app brings improved professional editing tools and new synchronization options
  • Metal 2 leverages more power with state-of-the-art development tools, robust graphics and an external GPU
  • Siri sounds more human and even has a new talent and hobby as a DJ

Are you ready to get beta version of macOS High Sierra?

Of course, these are just a few of features macOS High Sierra brings to the table. Once you’re convinced that macOS High Sierra is the system of your dreams, go straight to the clean install!

Why opt to clean install macOS High Sierra

A clean install of macOS High Sierra will ensure the maximum performance for your Mac. The reason is pretty straight forward: by formatting your Mac drive you will eliminate all the issues accumulated over time and have a clean slate to start again.

By opting for a clean install, you will regain valuable disk space and get rid of the useless files and junk apps that were causing a slow Mac. Thus, you will both be able to enjoy all the great features of macOS 10.13 at their best and experience a faster Mac experience, reaching the top performance it should.

clean install

How to prepare your Mac for the clean install

Check macOS 10.13 High Sierra compatibility

Before you can enjoy all the new goodies from macOS High Sierra, you must answer the question: can your Mac run macOS High Sierra? Nervous? Don’t be, as the specs look quite promising. How promising? Well, you’ll be able to upgrade to High Sierra even if you own a Mac as old as 2009. Sure, the hardware might cause you some slight drawbacks and refuse to run all the features, but overall you should be able to enjoy the big refinements. Things look even brighter when it comes to newer version of Macs, which should support the new operating system without any problem whatsoever.


Go for a system cleanup and fast backup

The first step towards a clean install, is a drive format. But act with caution! Before you do anything drastic, make sure you cleanup and backup your Mac to keep your important files.

Start with a system clean-up. Okay, that’s actually an euphemism for: delete everything you don’t need, throw away any duplicates and erase all the useless data.

Don’t know how to do that exactly? Check out How to clean up your Mac for a detailed and easy way to perform a thorough cleaning.

There are going to be some important files you will want to keep. Be it files, documents, photos, movies or other apps, you’ll want to create a backup for them. Where? That’s up to you. You can choose either iCloud or any external storage device with enough space.

Now it’s time to wipe your Mac clean. But you did perform a Mac backup, right? Good! Then you can format the drive! Here’s how:

Go to Applications > Utilities and click on Disk Utility. From here, select the drive and hit Erase, as you select Mac OS Extended (Journaled) as the format type.

disk utility erase


Before you start new life with the new macOS, get equipped with a couple of backup and maintenance tools. They will save you should something goes wrong. The good solutions are Get Backup Pro or Disk Drill

And the last thing before we start. A new OS needs a fresh Mac, so trim down the fat on your system. Use an app like CleanMyMac 3 to remove all system junk, large hidden files, and old apps' leftovers.

A step by step guide to clean install macOS High Sierra

1. How to download macOS High Sierra


The new macOS High Sierra has long been available for the developers only, but now is public and available in Mac App Store.

Here is the link to download it directly: macappstores://itunes.apple.com/app/id1246284741

Make sure you download the macOS High Sierra Installer to the /Applications folder and leave its default name.

2. Create a macOS High Sierra Bootable USB Drive

A clean install wouldn’t be possible without creating a macOS High Sierra Bootable USB drive. So let’s go ahead and create one! Find an 8 GB USB stick and make sure it is formatted as GUID Partition Map and Mac OS Extended (Journaled). To check if it is, launch the Disk Utility application. It’s from here that you’ll also be able to make the needed changes, if the case.

Once you’ve done this, plug in the USB into your Mac and launch Terminal. There are 2 options for doing this: you either go to Launchpad or you can choose the Spotlight search. Next, write the following command, letter by letter:

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

Ready? Great! Hit return, enter your admin password when prompted and them simply go along with the instructions to complete the process. In about 15 to 30 minutes you’ll have your bootable USB and you’ll be one step closer to macOS High Sierra’s world of new features.

3. Clean Install macOS High Sierra from USB Bootable Drive

You’ve got this far. Now, it’s time to actually hit the install button and leverage all the steps you’ve completed. Take your bootable USB and connect it to your Mac. To continue, restart your Mac while pressing the Option Key.

bootable drive install

This will open the Startup Manager from where you’ll be able to start the clean install. Proceed by erasing your hard drive from Disk Utility. Once you’ve deleted this, go back to the main menu and hit install. The steps will be prompted to you on screen, and you’ll easily be able to complete the installation. Voila! Now enjoy macOS High Sierra!

There you have it! A step by step guide to clean install macOS High Sierra Bea and be among the first ones who get to explore the new exciting features. Do let us know what you think!



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