How to Fix: Boot Camp Assistant Failed to Load Bootmgr?

Boot Camp is a Mac utility that lets you run Windows on your Mac without relying on virtual machines or dual-booting. Boot Camp Assistant is the utility that helps you create a Windows partition on your Mac, and then install Windows. If you’re seeing the "Boot Camp Assistant failed to load Bootmgr" error, it means that the Windows partition could not be created, and Windows cannot be installed on your Mac.

What could be the cause of the Boot Camp Assistant failing to load Bootmgr?

The Boot Camp Assistant (BCA) is a utility that comes with Apple’s macOS operating system. It helps users install Microsoft Windows operating systems on their Macs. However, there are times when the BCA may fail to load Bootmgr, which could be caused by a number of factors.

Reason 1: One possible cause is that the BCA is not compatible with the version of Windows that you’re trying to install. For example, if you’re trying to install Windows 10 on a Mac that’s running an older version of macOS, the BCA may not be able to load Bootmgr.

Reason 2: Another possible cause is that the BCA is unable to read the Windows installation files from the source media (e.g. USB drive, DVD, etc.). This could be due to a corrupt or damaged source media. If the BCA is unable to load Bootmgr, you may see an error message similar to the following: "Boot Camp Assistant cannot continue because the Windows installation disc is missing or damaged." If you see this error message, you’ll need to obtain a new Windows installation disc or use another source for the Windows installation files.

Reason 3: The Boot Camp partition may be corrupted.

How to Fix the Boot Camp Assistant Not Loading Bootmgr?

This can be caused by a number of factors, but most likely it’s due to a problem with the Boot Camp Assistant software, or a problem with the Mac’s firmware.

Here are some steps you can take to try to fix the "Boot Camp Assistant failed to load Bootmgr" error:

1. Try restarting your Mac, and then running the Boot Camp Assistant again.

2. Try running the Boot Camp Assistant in Safe Mode. To do this, restart your Mac, and then hold down the Shift key while it’s booting up. Keep holding the Shift key until you see the Apple logo.

3. Try running the Boot Camp Assistant from a different user account on your Mac.

4. Try resetting the NVRAM on your Mac. This can be done by restarting your Mac, and then holding down the Option, Command, P, and R keys while it’s booting up. Keep holding the keys until you hear the startup sound twice.

5. If you’re using a Mac with an Intel processor, try resetting the SMC. This can be done by shutting down your Mac, and then unplugging the power cord for 15 seconds. Then plug the power cord back in, and turn on your Mac.

If none of these steps work, then you may need to take your Mac to an Apple Store or authorized Apple service provider for further diagnosis.

What Are The Consequences of the Boot Camp Assistant Failing to Load Bootmgr?

If the Boot Camp Assistant fails to load Bootmgr, it could result in a number of consequences, including:

-The computer may be unable to start up properly, and may instead display a "bootmgr is missing" error message.

-If the computer is able to start up, it may have difficulty loading certain programs or files.

-The computer may experience stability issues, and may randomly restart or shut down.

-In severe cases, the computer may be unable to boot into Windows at all.

If you experience any of these issues after using the Boot Camp Assistant, it is recommended that you restart your computer and try again. If the problem persists, you may need to use a different method to install Windows on your Mac.

Other Ways to Create Windows Bootbale usb on Mac

Way 1. Use Microsoft Windows USB/DVD Download Tool

One way to create a Windows bootable USB on a Mac is to use the Microsoft Windows USB/DVD Download Tool. This tool can be downloaded for free from the Microsoft website. Once you have downloaded the tool, you will need to insert your USB drive into your computer and follow the instructions on the Microsoft website to create your bootable USB.

Way 2. Use Terminal

Another way to create a Windows bootable USB on a Mac is to use the Disk Utility application that is built into macOS. To use this method, you will need to have a copy of the Windows installation files on your computer. Once you have the installation files, you can use the Disk Utility application to create your bootable USB. Finally, you can also use the Terminal application on your Mac to create a bootable Windows USB drive. This method is a bit more advanced, and you will need to have some knowledge of the Terminal to use this method. If you are not comfortable using the Terminal, then you should use one of the other methods to create your bootable USB.

Way 2. Use SYSGeeker WonderISO for Mac

SYSGeeker WonderISO for Mac is a professional ISO file processing tool that can help you easily create, extract, burn, and mount ISO files on MacOS. With this tool, you can quickly and easily create ISO files from your existing files and folders, and you can also extract ISO files to your computer. WonderISO for Mac also allows you to burn ISO files to a CD or DVD, and you can also mount ISO files on your computer without having to extract them first. WonderISO for Mac is a great tool for anyone who needs to work with ISO files on a regular basis.

No matter which method you use to create your bootable USB, you will need to make sure that you format the drive as NTFS before you begin the Windows installation process. If you do not format the drive as NTFS, then you will not be able to install Windows on your computer.

Conclusion

If you’re seeing the "Boot Camp Assistant Failed to Load Bootmgr" error, it means that your Mac’s Boot Camp support software can’t be found.

This can happen for a number of reasons, but the most common is that your Mac’s Boot Camp partition is corrupted. There are a few ways to fix this problem, but the most straightforward is to use Apple’s Boot Camp support software to create a new Boot Camp partition. This will erase your existing Boot Camp partition, so make sure you have a backup of any important files before proceeding. Once you’ve created a new Boot Camp partition, you should be able to install Windows without any issues. If you still see the "Boot Camp Assistant Failed to Load Bootmgr" error, there may be an issue with your Mac’s hardware. In this case, you may need to take your Mac to an Apple Store or authorized service provider for further diagnosis.