How to Create macOS Big Sur USB Installer on Windows PC?
A macOS USB installer can be handy and time saving when your system has crushed and fails to reboot properly. Therefore, when a mac fails to boot the best thing you can do is to make a bootable USB installer and recover your system functionality. For purpose this there are two different ways to create a USB installer.
The first and easy way is to find another functional mac and make a bootable USB installer drive on the mac via Terminal or a third parties app such as UniBeast or MulitBeast. However, since not body holds a second mac the second option is to for a Windows PC.
Creating macOS Big Sur USB Installer on Windows pretty easy and straight forward. However, you still need few things, and the most important one is macOS installer image. With App Store or enrolling to Apple’s beta program or getting the macOS Catalina DMG file will do the most of the job.
Enough hitting around the bush. Let’s into steps to create macOS Big Sur bootable USB installer on Windows PC or Virtual Machines.
Check Your Device is Compatibility
Before you download and install macOS Big Sur 10.16, you have to make sure that your Mac or MacBook you’re installing is compatible. The models below support macOS Big Sur 10.16.
- MacBook 2015 and later
- MacBook Air 2013 and later
- MacBook Pro late 2013 and later
- Mac Mini 2014 and later
- iMac 2014 and later
- iMac Pro all models, including 2017 and later
- Mac Pro 2013 and later
How to create macOS Big Sur USB installer on Windows PC?
If you have a Time Machine backup it is wise to use Time Machine to recover a crushed mac. However, if you are not in the lucky list or have lost the boot partition, the last option for you is to go for a clean installation from a bootable USB installer.
Step 1: Download macOS Big Sur Image for Windows.
As said before the most important you need to make macOS Big Sur USB installer is to have a copy macOS Big Sur installer image.
It is easy to download a copy of macOS Big Sur image form App Store or Apple beta program if you have a running and functional macOS installed. However, if you do not a second running mac, I recommended to find one or barrow from your friends. Because it is the wise to have a real copy of macOS from Apple rather than third party’s website.
Step 2: Partition USB drive on Windows to make it bootable on Mac
It is certain that Apple use its own drive format and scheme, and not every drive format supported by mac such as MBR. Thu, make sure to convert the USB drive format into GUID Partition Table [GPT] as shown below.
- Plug your USB drive to your Windows PC [16GB recommended]
- Open the Command Prompt and apply the codes below in order.
1st code: diskpart
2nd code: list disk
This will list all the drives currently mounted on your PC. Now find your USB drive from the list; it may look as disk 0 or disk 1. However, the best to determine your USB properly is to look for the storage size.
3rd code: select disk X (X= disk sequence number as 0, 1, 2, 3)
4th code: clean
This will erase the USB disk
5th code: convert GPT
This code is going to the convert the USB format into a GPT scheme.
DISKPART> list disk
(Find the disk number)
DISKPART> select disk 2
Disk 2 is now the selected disk for me. Yours may look different.
DiskPart succeeded in cleaning the disk.
DISKPART> convert GPT
DiskPart successfully converted the selected disk to GPT format.
DISKPART> create partition primary
Step 3: Create macOS Big Sur USB installer on Windows PC
Among all the third party’s app you can used to make a macOS USB installer, the best and quickest one is the TransMac. It is available in both premium and trail version. Since you do not it more often it is wise to use a 15 days trail version.
1: Download TransMac app on your Windows PC.
2: Install TransMac.
Installation procedure is as sample as installing other programs on Windows PC.
3: Connect your USB drive to your PC.
You will need at least 8GB USB drive to create macOS Big Sur bootable USB installer. [16GB recommended]
4: Open TransMac as administrator,
If you are using a trial version of the software you will need to wait a couple of seconds after the application opens. Then click “Run“.
5: After TransMac is opened on your PC desktop, right-click on your USB drive, then select “Restore with Disk Image”.
6: Now select macOS Big Sur image or DMG file where you have downloaded or placed, then click “OK”.
After you selected the dmg file you will be notified that your USB drive will be erased. Press “Yes” to continue.
Step 4: How to boot to macOS Big Sur from bootable USB installer
Once everything is ready you can procced further to install macOS Big Sur on you Mac or MacBook. The process to install macOS Big Sur is simple and sweet.
- Connect your USB stick
- Restart or power up your Mac or MacBook, and hold down the [option key] while it reboots.
- Select macOS Big Sur from the list on boot menu.
- When the macOS Utilities screen appear, choose Disk Utility
- On Disk Utility screen choose the Eras tab then select your startup volume (probably called Macintosh HD).
- Choose a name for startup disk, then choose a format. If you have a recent Mac with an SSD startup disk, select APFS.
- Select Erase.
- When Disk Utility has finished erasing the disk, quit it to return to the macOS Utilities screen.
- Select Install macOS.
- Press Continue and choose the drive you just erased and re-formatted.
- MacOS Big Sur will start installing
- Your mac may restart several times as it proceed to install. Therefore, make sure to keep the USB connected, and wait until it finishes.
You can create macOS Big Sur USB installer both on a mac or a Windows PC. If you have a running or functional macOS you can use the terminal or third-party app such as UniBeast and MultiBeast. Similarly on Windows PC you can use third party app such as TransMac or command prompt [CMD] to create macOS Big Sur boot USB in Windows.