KrazyToad, thanks for the suggestion, but it did not work.
As I stated on my 1st post, I have a MAC with Mohave 10.14.1 update, the latest for my MAC.
When I go thru the protocal with HP Support, this is what comes up:
"NO SOFTWARE OR DRIVERS ARE AVAILABLE FOR THIS PRODUCT WITH THE SELECTED OPERATING SYSTEM. PLEASE MAKE A DIFFERENT SELECTION, OR VISIT THE PRODUCT HOMEPAGE."
I've deleted my 8600 from my MAC and tried to re-install, and NOW, it won't install. So I'm thinking athat the MAC 10.14.1 isn't compataible with the 8600 as it is now.
Any other suggestions?
Thanks!