Boot Camp 3.0 64 Bit Link
For the first time, users could install stable 64-bit drivers for the Apple Magic Mouse, wireless keyboards, and multi-touch trackpads without external downloads.
Boot Camp 3.0 was designed to work on a wide range of Intel-based Macs, but not all Macs were created equal when it came to 64-bit support. Apple's official documentation and user reports highlight the key requirements. boot camp 3.0 64 bit
Since Apple no longer hosts the original 3.0 installer as a standalone download, you may need to refer to archives if you lack the original disc: Internet Archive : Hosts the Apple Bootcamp Support Drivers Version 3 for historical and recovery purposes. Official Updates For the first time, users could install stable
installation DVD and is not officially available as a standalone download from Apple. Apple Support Community Essential Guide to Boot Camp 3.0 (64-bit) Since Apple no longer hosts the original 3
Once Windows 7 64-bit was fully installed and booted up, the final and most crucial step was installing the Boot Camp support software. The user would insert the CD/DVD or USB drive containing the Windows drivers that were created by Boot Camp Assistant in macOS. After inserting the media, the installer would typically auto-run, installing all necessary drivers for the Mac's hardware (graphics, network, audio, trackpad, etc.). Once the installation was complete, a final restart would bring the user to a fully functional Windows 7 64-bit environment running natively on their Mac.
This error occurs when the installer checks the Mac's model identifier against a hardcoded list within the MSI package. If you are certain your Intel processor supports 64-bit instructions, you can bypass this hardware check:

