AMD Radeon graphics logoHere it is the newest patch for the ASUS HD5850. Works with 10.12+ only.
ATIConnectorsController: uakari

<dict>
	<key>Disabled</key>
	<false/>
	<key>Find</key>
	<data>
		AAQAAAAEAAAAcQAAAAAAABIEBAEAAAAABAAAABQAAAAA
		cQAAAAAAAAESAQMAAAAAAAIAABQAAAAAcQAAAAAAAAAA
		BgUAAAAAAAgAAAACAAAAcQAAAAAAACIFBQQAAAAA
	</data>
	<key>Name</key>
	<string>AMD5000Controller</string>
	<key>Replace</key>
	<data>
		AAgAAAQCAAAAcQAAAAAAABIEBAEAAAAABAAAABQAAAAA
		cQAAAAAAACIFAQQAAAAAAAQAAAQAAAAAcQAAAAAAABEC
		BgMAAAAABAAAABQCAAAAcQAAAAAAABAABQUAAAAA
	</data>
</dict>

UPDATE: On 10.12.4+, you must set the color depth to “millions of colors” with SwitchResX, to solve the color bug in the newest legacy driver.