Boot Camp Support Software 5.1.5621 Link
If your Mac’s model identifier falls into the 11,x or 12,x range for MacBooks, or 14,x / 15,x for iMacs, version 5.1.5621 is likely the correct match.
If your Mac’s model identifier falls into the 11,x or 12,x range for MacBooks, or 14,x / 15,x for iMacs, version 5.1.5621 is likely the correct match.