It doesn’t matter if you’re using macOS, Windows 10 or Windows 11. It’s just a matter of time until your computer refuses to start
Which can happen for many reasons, including (but not limited to) file corruption, hardware failure
If the unexpected happens with your Apple computer, you can use a macOS bootable USB with installation media to fix it.
This is one of the main reasons why you should consider creating a bootable USB in macOS when your device is working properly.
However, if none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro, or Mac Mini) work when you need them most
You can use your Windows PC to rescue your Apple device.
You can use a computer with Windows 11, 10, 8.1 or 7
To quickly create bootable USB installation media to reinstall macOS Monterey, Big Sur, or Catalina on your Mac.
In this article, you will learn the steps to create a USB installable macOS Monterey on Windows 10
Which you can use to reinstall or upgrade the Apple operating system.
Work requirements
Create bootable macOS USB installation media
Create a GPT partition on a USB flash drive
Before proceeding, you will need the following:
A broken Mac computer running macOS.
Trial version of TransMac.
High quality USB flash drive with 16GB storage.
A copy of macOS (DMG file).
Create bootable macOS USB installation media
To create a bootable USB drive with macOS, use the following steps:
Download and install TransMac on Windows 10.
Quick note:
TransMac is a paid program, but it gives you a trial period of 15 days, which is more than enough time. (If this works for you and you want to support the developer, you can purchase the full version.)
Connect a USB flash drive.
(If you have any data on your flash drive, remember to back it up as this process will erase everything on it.)
Right-click on the TransMac app and select the Run as administrator option.
Click the Run button. (If you’re using the trial version, wait 15 seconds.)
TransMac on Windows 10
Right-click on the USB flash drive and select Format Disk for Mac option from the left navigation pane.
Format the disk for Mac using a GPT partition
Quick note:
You want to do this before creating the bootable media because there’s a good chance the drive is formatted with a Windows machine.
If this is the case, it’s probably using an MBR partition, and the USB drive needs a GPT partition to work on your Mac.
Click the Yes button to format the drive in the warning message.
Confirm the drive name. For example, “macOS bootable USB”.
Click the OK button.
macOS USB format with label
Click on the “Yes” button.
Overwrite the warning
Click the OK button.
Right-click on the USB flash drive and select Restore with disk image option from the left navigation pane.
TransMac Recovery with Disk Image Option
Click “Yes” to confirm the erasing of the USB flash drive.
Click the browse button on the right.
Select the .dmg file with the macOS installation files.
Select the macOS dmg file to create a bootable USB drive
Click the Open button.
Then click the OK button.
Then click the “Yes” button.
TransMac creates a warning for your bootable macOS USB drive
Once you complete the steps, you can insert a USB flash drive into your Mac computer to install, reinstall, or upgrade the operating system to the latest version of macOS, Sierra, Catalina, Big Sur, Monterey or higher.
Create a GPT partition on a USB flash drive
If the USB flash drive does not work with TransMac, it may still be a partitioning problem.
In this case, you may need to redo the entire process again. However, this time, you must use the following steps
To use the command line Diskpart utility on Windows 10 to create the appropriate GPT partition, then follow the instructions above.
To create a GPT partition on a removable drive, use the following steps:
Open the Start menu.
Find Command Prompt, right-click on the top result, and select Run as administrator option.
Type diskpart and press Enter.
Enter the list disk command to display all the drives connected to your computer and press Enter.
Type the command select disk with the number assigned to the USB flash drive (for example, select disk 4) and press Enter.
Enter the clean command and press Enter.
Type the convert GPT command and press Enter.
Enter the Create Primary Partition command and press Enter to complete the process.
Once you format a USB flash drive with a GPT partition, you can use the above instructions to use TransMac to create bootable media
But this time skip steps 5-10 and continue with step 11.
After the process is complete, which can take up to an hour, plug in the USB flash drive and turn on your Mac while holding the Option key, selecting the USB drive to start installing macOS.
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