Bootcamp Software Windows 7. The download here is the Boot Camp 5 Support Software which includes the latest drivers. Note that this version wont support XP or Vista.
Double click it to uncompress it if it is not automatically uncompressed. Insert the USB thumb drive with the Boot Camp support software that you downloaded earlier. 3 Boot into USB drive and install Windows.
You can now proceed with Boot Camp assistant Windows installation and boot the Mac in Windows.
If you must do the download in Windows instead OS X its harder. The utility also installs a Windows Control Panel. This download contains the Windows Support Software Windows Drivers you need to support 64 bit versions of Windows 7 and Windows 8 and Windows 81 on your Mac. 3 Boot into USB drive and install Windows.
