On Windows, I could use tab to shift focus from button to button, so I could "click" on the desired button without having to use a mouse.
It appears that I can't do the same thing on a Mac, or is there a way to do it that I didn't realize?
There is. From System Preferences, under Keyboard » Keyboard Shortcuts, you can enable Full Keyboard navigation. You can also change this by pressing
This allows you to tab between UI elements and select them with the