How to Change Your Background Login Screen First, let’s take a look at how you go about changing the background of your login screen on a Mac. These will be discussed at the end of this article. We disagree with this assessment and believe that there are a number of reasons that it is a good idea to change the background screen. Some people might argue that there is no valid reason to even spend a second of your time in such a worthless modification to your computer. It is a purely cosmetic change that will not affect anything except the visual impact when you login to your Mac.
Changing the background of your Mac’s login screen will not do anything to improve the performance of the machine.