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.
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
- Jun 02, 2020 How to Install macOS on Mac from USB Drive (Normal Way) If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way. Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer. Step 2: Shut down the Mac and wait for 1-2 minutes.
- Reformat your USB drive using Disk Utility. Choose format “Mac OS Extended (Journaled)” and name it “Yosemite” and then click “Erase.” 3. Select the drive and switch to the Partition tab.
On your Mac, open up Disk Utility. Click on the USB Drive on the left. On the right pane, go to the Restore tab. Click on the Browse button and locate the.dmg installer for OS X Lion. (ie macosx10711a390.dmg) 4. Once you have it chosen, click and drag your USB Thumbdrive from the left pane to the Destination box. Apr 27, 2021 Use the 'createinstallmedia' command in Terminal Connect the USB flash drive or other volume that you're using for the bootable installer. Open Terminal, which is in the Utilities folder of your Applications folder. Type or paste one of the following commands in Terminal.
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
Cleanup
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
- Pick this drive and click Erase in the top menu.
- Double-check what you’re erasing.
- Make sure the USB drive is shown as “Untitled”
- 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 Sur.app/Contents/Resources/createinstallmedia --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 Sur.app, 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:
- 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.
- 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) - Click Install macOS and choose to install it from the selected USB drive.
- 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.
8gb or greater usb install os x yosemite zip file downloaded from mac store download from here now let s move to the actual tutorial to create bootable os x yosemite usb connect your usb drive with mac. Now click on erase.
Download And Create Usb Installer For Mac Os X Yosemite Mavericks Mountain Lion Or Lion Macbold
You will create the bootable installer from this app not from the disk image or pkg installer.
Create bootable usb mac disk utility yosemite. Now you ll have to wait a long time. How to get older macos installation files. Use the restore disk image to drive dialog box to browse for the dmg file with the installation files for mac os x yosemite in this case and click the ok button to create a bootable usb of the operating system.
Launch the mac app store on your mac. This method also works to creating usb installer for el capitan yosemite and maverick and the other previous version of mac os x as well. Look for the version of macos you want in the store if you have previously downloaded the version search under your purchased tab.
Once you attached the usb drive it will shown on the left panel of disk utility. Step 2 open the installesd disk image. If you have already installed this version of macos you.
Open terminal which is in the utilities folder of your applications folder. Plug the external usb drive into mac make sure you save your stuff from it. In the warning dialog box click the yes button.
First make sure you have a usb flash drive that s at least 8 gbs in size then mount it. Today i am showing how to make a boot able usb drive for mac using a dmg file 8gb usb drive and the disk utility that comes with mac os x. Because since el capitan the disk utility of macos was different if you running el capitan and want to create bootable u sb for macos sierra you can use yosemite disk utility for el capitan just google it.
Select basesystem dmg in disk utility s sidebar and then click the restore button in the main part of the window. Create a bootable install usb drive of mac os x 10 10 yosemite step 1 reformat your usb drive. I hope this hel.
Drag the basesystem dmg icon into the source field on the right if it isn t. Click on the download button. Select usb drive from the left sidebar.
Now that your usb thumb drive is ready you ll need to open the. Prepare usb drive for os x yosemite open disk utility from applications utilities or press cmd space keys form keyboard to find disk utility. Click on erase tab from right.
Use the createinstallmedia command in terminal connect the usb flash drive or other volume that you re using for the bootable installer.
Install Hackintosh Yosemite On Pc Laptop Hackintosh Shop
Macbook Pro Not Detecting Bootable Usb With Yosemite Ask Different
How To Use Terminal To Create And Delete Raid 0 Striped Arrays Raid Osx Yosemite Mac Computer
How To Install Os X Yosemite Beta On A New Partition Safely Dual Boot Osxdaily
Mac Os Sierra
3 Ways To Create A Bootable Install Usb Drive For Macos Or Os X
Clean Install Os X Yosemite On Your Apple Mac Raw Mac
Install Windows 8 With Boot Camp On Yosemite With Usb Key Ole Michelsen
How To Create An Encrypted Disk Image Using Mac S Disk Utility
How To Quickly Make A Mac Os X Bootable Usb On Windows Pureinfotech
How To Make A Bootable Os X 10 11 El Capitan Beta Usb Install Key Ihash Osx Yosemite Installation Usb
How To Make Os X Yosemite Installer Usb Drive Mac Os X
How To Create Bootable Usb Of Yosemite Os X 10 10 Computersnyou
How To Make A Bootable Os X Yosemite Beta Usb Install Drive Osxdaily
Windows Create Os X Install Usb On Win Nandor690
Os X Yosemite Download File
How To Install Os Yosemite On Any External Drive Thumb Drive Usb Disk Etc Compsmag
How To Create Bootable Usb Installer For Os X Yosemite
4 Tools To Burn Dmg File To Usb On Windows And Macos Uubyte
Mac Os X Yosemite Bootable Usb Download Peatix
Download Os X Yosemite
How To Make Bootable Os X Yosemite Usb Flash Drives And Other Media