How to create macOS Big Sur USB Installer for Clean Installation?
Creating a bootable macOS Big Sur USB installer can be handy and effective to do a clean installation, especially if your Mac or MacBook has crushed and does not reboot normally as it should.
The reason for macOS failure can vary from a file corruption, buggy update, hardware failure, malwares or… However, whatever the reason maybe in such situations when your mac cannot be repaired online, you have to consider a macOS bootable USB installer to recover your system normal functionalities.
Consequently, to retain your mac work flow, in this practical article I will show you the definitive steps to create macOS Big Sur USB installer for clean installation and system recovering. It is also worth mentioning that this procedure will work with both the macOS Big Sur developer beta, public beta and the final version of macOS Big Sur.
Check it out if your Mac or MacBook support macOS Big Sur.
Mac OS X has come to an end, and Apple Inc has deployed the 11.x series with macOS Big Sur in front line. As always some of the out dated Mac and MacBook will not support the new macOS Big Sur. As result only the list below can be used to install macOS Big Sur.
- MacBook from year 2015 or later
- iMac Pro 2017
- MacBook Pro late 2013 and later
- Mac Mini from 2014 onwards
- MacBook Air from 2013 onwards
- iMac 2014 or later
- Mac Pro 2013 and 2019
Steps to create macOS Big Sur bootable Installer
To create macOS Big Sur bootable USB installer you need some pre required data and tools. The most important one is macOS Big Sur Image or DMG.
Step 1. Download macOS Big Sur Image
Since the macOS Big Sur in beta-1 version and only paid developer can download a copy of it, we have provided you the macOS Developer BetaAccess Utility tool to download macOS Big Sur without a developer account within direct links.
- Download macOS Big Image here
Step 2. Create macOS Big Sur USB Installer
There are many methods to create macOS bootable USB installer, but the two most reliable and easy ways are to use Terminal and a third party’s app called UniBeast.
Since the UniBeast is not rolled out yet for macOS Big Sur, we will consider the terminal for purpose of this article. In addition, once the UniBeast released for macOS Big Sur I will include the step-by-step process to this article.
1. Connect a USB Disk to your mac
macOS Big Sur is huge and you will need at least 16GB of USB drive to make macOS big Sur USB installer. Furthermore, to speed up the process it is recommended to prepare a USB type [3.0]
2. Erase the USB Drive
Next thing you need is to erase the USB drive with a proper format and scheme. To erase the USB drive open spotlight and search for Disk Utility. On Disk Utility windows make sure to format the USB disk as following.
- Name: macOS Big Sur
- Format: Mac OS X Extended (Journaled)
- Scheme: GUID Partition Map
3. Keep a copy of macOS Big Sur in Application folder.
Simply open the application window and drag and drop a copy of macOS Catalina image or dmg in Applications Folder. Make sure you unzip macOS Big Sur folder first, then leave a copy of macOS in Application folder.
4. Open the spotlight then search and open the Terminal window.
5. Type on terminal the word sudo and press one-time space bar.
6. Now open the Applications Folder and find the copy of macOS Big Sur you drop in before.
Right-click on macOS Big Sur in the application folder, then choose Show Packages Contents > Contents > Resources and look for creainstallmedia
7. Now with your mouse cursor drag createinstallmedia and drop it on the terminal window and type —volume then press one-time the space bar.
8. Now return to your desktop, and press CMD+shift+G to open Go to Folder then type /volume and press enter.
9. Here you will see all the mounted drives including your USB drive. Drag your USB drive and dropit on terminal window, then press enter key once.
10. Enter your admin password and press enter key
11. Finally type the letter ” Y “ on the terminal to agree. And your flash drive will start booting.
The process may take a while. Make sure to keep your USB drive connected.
Terminal Code to create macOS Big Sur Bootable USB installer:
Please replace the XXX with your USB drive name.
sudo /Applications/Install\ macOS\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/xxx
Alternative Method- Create macOS Big Sur USB Installer on Windows PC.
Creating macOS bootable installer on Windows PC is another handy method to recover your system performance. Therefore, to create macOS Big Sur bootable USB installer on Windows, you will need to have a PC with functional Windows on it. Read more
As I said before macOS Big Sur USB installer is an effective way for clean installation. Based on your interested you can create macOS Big bootable USB installer on a mac or a Windows PC.
If you needed something leave it in the comment box below.