If you talking about AMD Driver for Windows BOOTCAMP on your Mac PC here is the latest from AMD: https://www.amd.com/en/support/graphics/mac-graphics/apple-boot-camp
If you are talking about a regular MAC OS PC without Bootcamp all AMD drivers are natively installed from the OS itself. To update the AMD driver in a MAC OS you need to upgrade the MAC OS to a new version.'
This Unofficial Bootcamp Website gets the latest AMD Driver and modifies it to run in Windows Bootcamp. Check out the Compatibility chart before downloading to see which driver will be compatible with your AMD D500 Pro GPU Card: https://www.bootcampdrivers.com/
Compatibility Chart from above link:
EDIT: Found out that the AMD FirePro D300/500/700 were specially made for MAC PRO computers. So if the above Bootcamp drivers doesn't work you will need to open a Apple Support Ticket to see what drivers they have available.
AMD Support will not help you in this case and will just refer you to Apple Support.
