Instead of locating these junk files yourself, you should use a Mac Cleaner software like Movavi Mac Cleaner to clean up your Mac computer. You run a risk of deleting important system files when you try to do the search for the junk files yourself. You might be wondering how to remove junk files from Mac manually since it isn’t easy to locate these files yourself. Junk files can refer to various types of log files, installed applications that you are not using anymore, images and videos that you didn’t opened for a long time, duplicate files in different folders and unused language packs. One of the reasons why your computer performance can slow down is because of the junk files that have been accumulating on your computer over time. If you use your computer a lot to do your work, you must make sure that it is able to give you top performance at all time.