Mac Os Install Usb Stick

Apple released macOS Big Sur on November 12, 2020. macOS Big Sur continues the list of Central California landmarks as well as marks the new operating system for Mac. Those who tried it say that it’s more stable. It also sports a refreshed version of Safari that is 50% faster than Chrome. Here’s how to perform a clean install of macOS Big Sur with pictures and helpful tips along the way.

So, plug the USB stick in your Mac and run Disk Utility. Delete all its partitions and configure according to the below screenshots: Press apply and wait until the formatting process ends. After that, click in the ‘Restore’ tab, drag the.dmg file from your Mac OS installation and the USB stick to the Source/Destination fields. Using Usb bootable to install macOS for real Mac user and hackintosher. For Mac user: For Mac user your USB bootable now ready for installing fresh macOS system. To use the bootable installer on Mac, connect the volume containing the bootable installer to your Mac. Use Startup Disk preferences or Startup Manager to select U SB volume as the. Yet, again the Mac failed to pick up the USB Stick as a Start-Up Media. Acute Systems DMG Files in Windows Link; PureInfoTech Mauro Huc How to quickly make a Mac OS X bootable USB on Windows Link. Step One: Boot From Recovery Mode, or an Installer. Your Mac’s Recovery Mode is a treasure trove of useful tools, and it’s the easiest way to wipe your computer and start from scratch. Shut down your Mac, turn it on while holding down Command+R. Your Mac will boot into the recovery partition. If you’re using an older Mac (from 2010. In this article we'll run through the steps necessary to create a bootable installer of the Mac operating system. Install drive: a USB stick (or a Thunderbolt drive) and the installation files.

What is a clean install? (Big Sur or any other macOS)

A clean install means that you install the macOS onto the erased drive.

Why is clean install more preferable?
A clean install is the opposite of macOS upgrade. You format your hard drive, and therefore, it keeps no leftovers from the previous macOS.

  • macOS performs faster
  • You get rid of apps you don’t use
  • Persistent issues may go away

Basic steps to clean install macOS Big Sur

The first step is to clean and back up your Mac to some external source. Then, you’ll need to download macOS Big Sur package to your Applications. Next, you’ll need to create a bootable USB installer (involves another external drive). And lastly, we’ll use Disk Utility to erase your Mac and install macOS Big Sur using the bootable USB device.

1. Clean & Back up your Mac


Cleaning your Mac is generally a healthy practice but since we’re about to back your Mac up, it’s worthwhile to get rid of system junk first. After we’ve cleaned your Mac, you’ll end up with a refreshed system ready for a Time Machine backup.

Time Machine will make a snapshot of your system.But before that we’ll ensure there's no unwanted leftovers on your entire Mac. To clean your machine automatically, you can run CleanMyMac X. This tool is one of the best-known cleaning utilities for Mac, and it’s been notarized by Apple.

Download the free version of CleanMyMac X cleaner here.
Install the app and click on System Junk to perform the scan.

Back up your Mac

Now, you’re ready to back up your computer. There is a tool built just for that purpose, you guessed it, Time Machine. Time Machine needs a storage source onto which it will copy your system.
So, you’ll need an external drive. This is the first external drive that we will use to clean install macOS Big Sur. This is the reserve backup for the worst-case scenario.

  • Go to System Preferences > Time Machine.
  • Connect an external drive (that’s more spacious than your current system).
  • Select this Disk as a backup source in Time Machine.

Well done. The preliminary steps are done with, and we’re ready to clean install macOS Big Sur.

2. Download macOS Big Sur installer

macOS Big Sur has been released on November 12, 2020.

Since the public release in the fall of 2020, macOS Big Sur can be downloaded from the Mac App Store. It also can be found in the Software Updates pane in System Preferences.
So you’ll find it in System Preferences > Software Updates.

  • Click Upgrade Now

Wait for the installer to download onto your drive. You will see the macOS Big Sur intro screen.

Don’t click Continue but for now, close this window by choosing Quit Install.

We only want to make sure that the app called Install macOS Big Sur.App is now firmly sitting in your Applications.

This is the file we’ll use later to run the clean install of macOS Big Sur via Disk Utility.

Now, and only now have we come to clean installing macOS Big Sur. This is only a short stop on the road, so catch your breath, and let’s move along.


3. Create a bootable Big Sur installer

Now, it’s time to grab another USB flash drive and connect it to your Mac. This drive should have at least 16 GB of storage space.

Wipe the drive clean with Disk Utility

  1. Pick this drive and click Erase in the top menu.
  2. Double-check what you’re erasing.
  3. Make sure the USB drive is shown as “Untitled”
  4. Under Format, choose: Mac OS Extended (Journaled)

All data on that disk will be lost, so beware.

Go to Terminal (Phew, we’re almost there)

This step will actually create the source disk so we can install Big Sur from bootable USB.

Launch Terminal app from your Launchpad.

Paste in the following command:

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

Type in your admin password and press Return and Y to confirm the action.

This command creates a bootable USB installer based on macOS Big, which we’ve previously placed in your Applications.

4. Erase your startup drive in Disk Utility

It’s time to wave goodbye to your current configuration. Remember, we’ve already cleaned it up from junk with CleanMyMac X and backed it up onto our first reserve USB drive.

Now, start your Mac in Recovery mode:

Install mac os from usb stick
  • Turn off your Mac and hold down Command + R.
  • Choose Disk Utility from the menu.
  • Choose your main startup drive and click Erase.

Voila! Your Mac is now formatted. What you can do now (actually, this the only thing you can do now) is to clean install macOS Big Sur 11 from the connected USB installer drive. If it’s not connected, connect the bootable USB installer now.

  1. Go back to the original Disk Utility screen
    (If you can’t return to Disk Utility, restart your Mac and hold down the Option key)
  2. Click Install macOS and choose to install it from the selected USB drive.
  3. Click on “Install macOS”

How do I regularly install macOS Big Sur?

The regular install is done via upgrading your current macOS. That is, you don’t erase your entire disk. When the new macOS Big Sur is officially released, you just open the App Store > Updates.

Or even better, go to your System Preferences > Software Updates

How to reinstall macOS Big Sur?

If for some reason your Big Sur macOS doesn’t work as expected, you can reinstall it by sending your Mac into Recovery Mode.

  • Restart your machine and hold down ⌘ + R
  • Choose Reinstall macOS

That’s it.

As we’ve just seen, running a clean install of macOS Big Sur could be a crazy rabbit hole. We hope you survived. Now you’ll be rewarded with the best Apple’s operating system up to date. You’ll also have a clean Mac that works at blazing speed with a little extra help from our favorite Mac cleaner — CleanMyMac X. You can get started with a trial version — so download it here.

Computers fail. It’s a fact of life, whether you like it or not. Eventually a file is going to get corrupted, a patch is going to screw something up, or you’re going to accidentally delete a critical component. It happens to all operating systems all the time, MacOS included. Yes Mac fanboys, your computer too.

The solution to this problem is simple. You should be keeping constant backups using Time Machine (or even better, relying on offsite backups as well). But this only solves part of the problem. If you are forced to wipe your entire Mac hard-drive, what’s the easiest way to get a hold of a fresh copy of MacOS and do a clean install?

The answer is to make a bootable installer on a USB stick, and it really isn’t difficult in the slightest, as I will now show you. Then you can have it sitting by the computer standing by, just in case.

Bootable MacOS Installer Recipe


1 USB stick, with minimum 8GB space (blank)
MacOS Installation File (Currently Sierra)
Disk Creator
Time & patience

Step 1 – Get a Blank USB Stick

Make sure you have a blank USB stick, and that it has a minimum of 8GB space. For the purposes of speed, you should also get a proper USB 3.0 stick, and not use some crappy little 2.0 stick that will crawl along at a snail’s pace.

Also, transfer any existing critical files off the stick, because when Sierra jumps on there, everything else is going to get nuked. It’s a bit anti-social like that.

Step 2 – Get The MacOS Operating System

Download the MacOS installation file. This should open up your Mac App Store, but if not, click on “View In Mac App Store” to give the Mac store a nudge.

Now click “Download” to start the Sierra installation. I was redirected to the German page since that’s where I am, but you will be redirected to the page of your own country.

At this point, you need to be aware of two things.

First, your Mac will get itself a bit worked up, because you are already running Sierra (hopefully). You will therefore get a box where you have to confirm you want the file. It is basically asking you “what the hell do you need the Sierra installation file for again?”. To confirm you still want the file, click “continue” and the download will start.

Mac os bootable usb disk utility

Second, it took me 45 minutes to get the whole file, and I am on a fast Internet connection. The size of the installation file is 5GB in total. So it’s probably best to start this, and then go off and do something else.

When the file has finished downloading, you will find it in your Applications folder under the name “Install MacOS“.

Install Macos On Usb Disk

I should also point out that as soon as the installation file has finished downloading, it will immediately open up and attempt to start the installation process on your computer. Simply close the window. But it is a bit persistent and may try again.

Step 3 – Insert Your USB Stick Into The Computer

Pretty self-explanatory!

Step 4 – Download & Install Disk Creator


The next step is to download and install Disk Creator. Then open it up and you will see this :

Choose the USB stick (using the drop-down menu at the top), then click “Choose a MacOS Installer“. Navigate to where the OS installation file is, and choose it. The icon of the file will then appear in the window at the top.

It will ask you if you are sure you want to proceed with the wiping of the USB stick and the installation of the installer. Then you have to enter your MacOS password for the process to begin. Now sit back and wait. It will take some time.

One Drawback Of Creating a USB Installer

Mac Os Install Usb Stick Driver

There are many advantages of a USB installer, including the ease of installing a fresh new system onto a Mac without any jiggery-pokery with the Terminal. But one drawback is that Apple brings out so many regular OS updates that your installer is soon going to be out-of-date, if you don’t need to use it for quite some time.

Mac Os X Bootable Usb Disk Utility

Of course this is easily solved by installing the OS version you have, then going to the Mac store and installing all of the updates. But that could be quite a few, depending on how old your USB installer is.

Using The Installer

Mac Os Install Usb Stick Free

To begin the installation process using the USB stick, put it into the Mac’s USB port. Then simply boot up your Mac, and as it is starting up, hold down the Option key. This will activate it, and just follow the on-screen instructions from Apple.

See how easy it was? But if you do have a problem, let me know in the comments. I will do what I can to assist.