Download Boot Camp Support Software 5.1.5769
This download contains the Windows Support Software (Windows Drivers) you need to support 64 bit versions of Windows 7 and Windows 8, and Windows 8.1 on your Mac.
For more information on which operating systems are supported on different Mac systems, click here: http://support.apple.com/kb/HT5634
• The download file is a .zip file. Double click it to uncompress it, if it is not automatically uncompressed.
• Double-click the Boot Camp5 folder.
• Copy the entire contents of the .zip file to the root level of a USB flash drive or hard drive that is formatted with the FAT file system
• When running Windows, locate the Boot Camp folder on the USB media you created in Step 3 and double click to open it.
• Double click on setup to start installing the Boot Camp Support Software.
• When prompted to allow changes, click on Yes and follow the onscreen instructions.
• Installation can take a few minutes. Don't interrupt the installation process. When installation is complete, click Finish in the dialog that appears.
• A system restart dialog box appears. Click Yes to complete the installation.
For more information on Boot Camp, click here: www.apple.com/support/bootcamp