I am a Windows person, so I am speaking from a position of ignorance, but did you unzip the downloaded .zip folder (which I believe can be done in recent Mac os's by simply double-clicking its icon)? And did you then locate the .dmg file which would have been extracted from the .zip folder when you double-clicked it, and do something to cause the .dmg file to install the driver? I suspect that "something" would mean simply double-clicking the icon of the .dmg file, but perhaps one of the others with Mac experience can clarify the exact procedure.
Regards,
-- Al
Regards,
-- Al