Check first

I just learned a potentially expensive lesson when it comes to upgrades. That is, check any necessary driver availability before doing the upgrade. I've got an expensive Samsung color laser jet multifunction. It was working great. Then I upgraded to HS from Sierra, without thinking to check the driver availability. Samsung has drivers thru 10.9. I called Samsung, and no plans for a HS release. Grrrr .....

I did try installing the 10.9 drivers. The installer barfed, claiming there was a missing file. Interestingly the missing file is included in the download package, as a separate file. But the installer can't seem to recognize it. So it looks like I've got an expensive desk ornament.