There is a setting called accessibility.
This allows the user to set personal changes to their computer.
If there is a issue or the user wants to make some personal changes, this is the place to explore first.
Click on the bottom dock the wifi cone or the battery display on the desktop.
You will see a few option-ChromeVox(speaks to the user)
High contrast mode( makes the user computer dark or light)
Screen Magnifier(makes your screen image close or far away)
Automatic clicks(allow the user to not push on the trackpad for clicking, it atomatically clicks the necessary points when scrolling)
On-screen keyboard-(allow the user to use the track pad to type instead of using the keyboard)
These are some of the options that may help with certain issues or personal preferrences.