Users generally find that while the installation process for Windows 10 itself is straightforward, getting the drivers from package 4.0.4033 to work is where the real value lies.
If macOS is trying to manage your storage dynamically in the cloud, it can disrupt the continuous physical disk space Boot Camp requires. Go to > [Your Name] > iCloud . Turn off Optimize Mac Storage .
sudo pmset -a powernap 0 sudo pmset -a hibernatemode 0 sudo rm /var/vm/sleepimage
Ensure your Mac is plugged into a power source throughout the entire process.
Click the button at the top of the window, then click Run.
and manually remove the "OSXRESERVED" and "BOOTCAMP" partitions to reset the drive to a single APFS container before trying again. External Storage Conflict
The Boot Camp error 40 (often paired with internal code 4033) means your Mac cannot download or verify the Windows support software from the Apple servers. This error completely halts the Windows 10 installation process on Intel-based Macs.
Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support
For older Macs that require version 4.0.4033, the installation typically follows these steps: Acquire the Software
Boot Camp Assistant normally downloads drivers automatically, but for a Mac Pro 6,1 you should pre‑download them to avoid network issues inside Windows:
Temporary hardware configurations can block the download handshake with Apple servers. Turn off your Intel Mac completely.
Error code 40 generally points to a disk permission or partition map issue. The 4033 sub-code is unique to Bootcamp on macOS High Sierra, Mojave, Catalina, Big Sur, and Monterey. It translates to: "The disk cannot be partitioned because some files cannot be moved."
Before fixing the problem, you must understand it. When Boot Camp Assistant attempts to partition your startup drive (usually an SSD or Fusion Drive), it needs contiguous, unmovable space.
Once Windows is running, your trackpad, Wi-Fi, or sound might not work yet. Open your USB drive in Windows File Explorer. Navigate to the BootCamp folder and run .
Before diving into the fixes, it helps to understand why this happens. When Boot Camp Assistant begins the installation process, it performs three primary tasks:
When using the standard Boot Camp Assistant on these models, macOS often downloads drivers that are incompatible with Windows 10, or worse, drivers meant for Windows 8.1 that fail to initialize in Windows 10. The result is a fresh Windows 10 install with if an external mouse isn't present.
