How can I create a macOS bootable installer on Windows 11 for device repair?

Those who want to create a bootable macOS installer on Windows 11 may find that the macOS installation image format isn't always compatible with Windows' USB writing tool. For this reason, it's very important to prepare the correct, compatible image first.

balenaEtcher provides a simple interface for writing compatible disk images to USB drives. Select the prepared macOS image, choose the correct USB drive, and click "Flash" to begin. Existing data on the selected USB drive will be erased.

After flashing finishes, safely disconnect the USB drive and connect it to the target Mac. Start the Mac using its startup options and check whether the installer appears as a bootable volume. For users trying to create a macOS bootable installer on Windows 11, remember that writing the image successfully does not guarantee that every macOS image will boot on every Mac model.

You can use Internet Recovery to create a macOS bootable installer on Windows 11, you will use a tool that downloads a small recovery environment directly from Apple's servers. This method does not require a full macOS installer file, making it a reliable way to create a macOS bootable installer on Windows 11 for device repair.

Follow these steps to create a macOS bootable installer on Windows 11:

1.Format your USB drive as FAT32. You can right-click it in File Explorer and select "Format...".

2.Find the macrecovery folder. Unzip the OpenCorePkg you downloaded, and navigate to Utilities\macrecovery.

3.Open Command Prompt there. Click in the folder's address bar, type cmd, and hit Enter. This opens a terminal right where you need it.

4.Download the Recovery Image. Now, paste the command for the version of macOS you want. For example, to get the latest version, use this command:

bash

py macrecovery.py -b Mac-937A206F2EE63C01 -m 00000000000000000 download

5.Copy to USB. Once it's done, create a new folder on your FAT32 USB drive named com.apple.recovery.boot. Copy those two downloaded files into it.

Your USB drive is now ready. You can plug it into the Mac you wish to repair, turn it on while holding the Option (⌥) key, and select the USB drive to start the Internet Recovery process. The installer will then download the full macOS from Apple's servers during installation .

Hi CharlesMr

Before spending time creating a USB installer, check whether your iMac supports Internet Recovery. Many Intel-based Macs can start Internet Recovery (usually by holding Option+Command+R or Shift+Option+Command+R at startup) and download macOS directly from Apple's servers, which avoids compatibility issues with Windows-created installers. If you do create a USB installer from Windows, keep in mind that third-party tools are not Apple-supported and success can vary by macOS version and Mac model. Apple recommends downloading installers directly from Apple sources whenever possible.