(Featured image by Adam Engst)
Tips to Prevent a Frozen Screen:
The Mac is a very powerful and durable computer. It takes a lot for them to slow down, but when they do, it could be for several reasons. Like any computer, when your device has too much stored or too many apps open, it will start fighting for processing power. There are many other instances that can cause a frozen screen, but if you think you’re dealing with too much storage, there are a few ways to fix this.

First, check to see if storage is the problem by clicking the Apple icon > About this Mac > Storage. If there’s not too many GB left over, then it might be time to clear out your Mac.
To clean it up, drag or move unwanted files, photos, applications, etc. to the trash. Once they are deleted, the trash still needs to be emptied. To empty the trash, you can right click the trash icon and select “Empty Trash”, or you can go up to the Finder drop down menu and select “Empty Trash” from there.