To fix that, the MBR partition info needed to get fixed, in order to make the Windows NTFS visible again to the Windows boot system.Īfter writing this article initially, I learned that there is a Mac program, WinClone, that can fix this issue with a few clicks, in case you do not want to mess with it yourself as shown below. Why that even happened? Probably from repartitioning operations I frequently perform on my disks - and Apple's Disk Utility is quite ignorant of the needs to keep Windows bootable in this regard. The main reason in my case was that the MBR was reset to a plain GUID entry, and my Windows versions do not like that, because they cannot handle the EFI / GUID partition info that the Mac prefers. When the download has been completed, quit Boot Camp. From the menu bar at the top of your screen, choose Action > Download Windows Support Software, then choose your USB flash drive as the save destination. Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder. Reboot your computer when you are asked to.
Step 4: Once done, click the Finish button. Note that old drivers will be updated to the newest version during the process. Use Apple Studio Display or Pro Display XDR with Boot Camp. Use the function keys on MacBook Pro with Touch Bar. How to use Apple Software Update for Windows. Step 3: Click the Repair button to install missing files and repair damaged Boot Camp drivers and data. Here are some Apple Support articles that might help you troubleshoot Boot Camp on your Intel-based Mac: Download and install Windows support software on your Mac. Holding Opt at boot ought to let you switch to macOS from where you should be able to run the Boot Camp Assistant & download the drivers again. Make sure your Mac is connected to the internet. Where F is the drive letter of the USB drive. Recently, I found that almost all of them have disappeared: I was not able to boot from them any more when I held down the option (alt, ⌥) key at startup - the Windows partitions would either not appear at all or not boot up. The most likely explanation is that the reset has deleted the specific Boot Camp drivers which enable Windows to see the APFS file structure & make changes to the startup disk. I have installed several Windows 7 and 10 version on several of my Macs using Apple's Boot Camp feature.