This is one of those rare occasions when Apple makes a mistake and assumes people can tolerate even a fraction of the change they were never looking for:
For longer than I care to admit, I have been unable to scroll down on my computer. This is only the latest in a series of laptop-related inconveniences, but, given the nature of my employment, is something of a problem. If you manage to catch the scrolling bar to the far right of the screen, you can generally navigate okay, but if you relax your vigilance for a moment and move your cursor, that option is closed, and it is necessary to refresh the screen. At least, that’s the only way I know how to do it.See above for the answer...I struggled for days with our newly-upgraded MacBook and finally figured out what to do. I Googled the problem and someone coughed up an answer. That's how you do it nowadays. You look for people who are similarly challenged and copy them. What could go wrong?
Now, if this person doesn't have an Apple, then they're screwed and no one should care. But still...one should never be too proud to Google or beg.