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How to make a bootable Sierra installer drive in case you want to downgrade from macOS High Sierra

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How to make a bootable Sierra installer drive in case you want to downgrade from macOS High Sierra

macOS High Sierra is a working beta, but what if you want to keep a copy of macOS Sierra, too?

If you are preparing to test out macOS High Sierra, there is one additional set of steps you should follow. You should download a bootable copy of macOS Sierra. This allows you to use it if you partition your hard drive for dual-software installation. It is also the only way to downgrade to the older format if you decide you don’t like macOS High Sierra at all.

Before you start
How to format your external drive for Mac
How to make your external drive bootable for Sierra
How to use Sierra with a bootable drive

Before you start

Before you get started, make sure you have a thumb drive with at least 8GB of storage, or a spare external hard drive (one that you don’t use with anything else).

You’ll also need to download macOS Sierra from the Mac App Store.

Note: After macOS Sierra has downloaded, it will automatically begin the installation process. Close the installer instead.

Please, P…

macOS High Sierra is a running beta, however what if you want to stay a replica of macOS Sierra, too?

If you are making ready to check out macOS High Sierra, there may be one further set of steps you must observe. You must obtain a bootable replica of macOS Sierra. This permits you to use it if you partition your hard drive for dual-software set up. It's also the one means to downgrade to the older structure if you make a decision you do not like macOS High Sierra in any respect.

Earlier than you get started

Earlier than you get began, make certain you have a thumb drive with a minimum of 8GB of garage, or a spare exterior arduous drive (one who you do not use with anything).

You'll be able to additionally want to download macOS Sierra from the Mac App Retailer.

Be aware: After macOS Sierra has downloaded, it'll routinely start the set up procedure. Shut the installer as a substitute.

Please, Please, Please, backup your Mac sooner than you do anything else.

How to structure your exterior drive for Mac

You'll be able to want to get started with a blank thumb drive or arduous drive in order to get it able to paintings as a bootable drive.

  1. Plug the USB finish of the drive to a USB port in your Mac.
  2. Click on on Finder in your Dock to open a Finder window.
  3. Make a choice Packages from the record at the left facet of the window.

  4. Scroll down and double-click on Utilities.
  5. Scroll down and double-click on Disk Application.

  6. Make a choice your drive below Exterior.
  7. Click on at the Erase tab on the peak of the window.

  8. Be aware the identify of your exterior arduous drive (almost definitely "Untitled") as a result of you will want it when you create a bootable drive. If you have multiple exterior arduous drive named "Untitled," you will want to rename your arduous drive now.
  9. Make a choice Mac OS Prolonged (Journaled) from the structure record.
  10. Click on Erase.
  11. Click on Executed when the method is entire.
  12. Shut the Disk Application window.

Your thumb drive or exterior arduous drive is now able.

How to make your exterior drive bootable for macOS Sierra

Essential:You're going to want to be in your Mac's administrator account in order to run the sudo Terminal command

  1. Click on on Finder in your Dock to open a Finder window.
  2. Make a choice Packages from the record at the left facet of the window.

  3. Scroll down and double-click on Utilities.
  4. Scroll down and double click on on Terminal.

  5. Recall the identify of your formatted external drivewhen getting into the next textual content into Terminal. If it's not named "Untitled," you will want to exchange the command syntax for the pathname the place it says: Volumes/Untitled. The identify of the drive cannot have any areas and it's case delicate.
  6. Input the next textual content into Terminal (Do not put out of your mind to exchange the identify "Untitled" in case your arduous drive is called one thing else):

    sudo /Packages/Set up macOS Sierra.app/Contents/Assets/createinstallmedia --volume /Volumes/Untitled --applicationpath /Packages/Set up macOS Sierra.app

  7. Hit the input/go back key.

  8. Input your administrator account password. That is the password you use to make adjustments in your Mac or log in. No textual content will seem in Terminal when you input the password.

The method may just take a very very long time, relying at the drive. When it's carried out, the Terminal window will document "Executed."

How to use macOS Sierra with a bootable drive

As soon as macOS Sierra is put in in your exterior drive, you can boot up any Mac with the drive plugged into it.

  1. Flip off the Mac you want to use macOS Sierra with the bootable drive.
  2. Attach the drive to your Mac by the use of the USB port.
  3. Flip in your Mac.
  4. Cling down the Possibility key when you listen the startup chime.
  5. Make a choice the exterior drive with macOS Sierra on it from the record of methods to get started up your pc.

Do you have any questions on how to create a bootable drive for the macOS Sierra installer? Tell us in the feedback.

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