Update Operating System
Before to do anything, make sure Mac operating system is up to date. Click on the Apple icon > App Store, then click on Updates tab. Install any update if you see here. This might include security updates or small performance improvements for your Mac Operating system which you are running.
Get Ride of Unwanted apps
The applications you have installed on your Mac System take up space, of course. Over time when Mac becomes full of different apps, it may start running slowly. You need to remove unwanted apps you no longer use or need. Just deleting or sending them to trash is not enough. Uninstall them in right way
Clean your storage space
If you are wondering where disk space went, then you probably need to clean up Mac hard drive and delete all unnecessary files. This can be a few downloads you forgot about, or it might be entire directories of files you no longer need. Deleting them is a good way to make more room on your computer. These are consifered as best tips to clean your mac.
Remove old disk images
Mac uses disk images to install files in a computer, which makes for easy installation, but also means that some of us tend to have random disk images all over the place. Using the Finder, go to wherever you saved the Disk images and delete it like any other file.
Clean up Cache
Cache files are basically temporary data and files used to speed up processes. There are plenty of tools that can handle this job for you. Download any MacBook cleaner like CleanMyMack3 to do this task.
Remove Old Mail Downloads
If you use Apple Mail, attachments and other random files can fill your hard drive up fast without you realizing it. Press “Command + Space” Search field will appear and then type “Mail Downloads.” Hit Enter on the folder that pops up. This folder might have hundreds of files. These are all the various attachments Mail has downloaded over the years. Select files from here and delete them.
Remove files from Trash
Even though you delete files, but these reside in the Trash folder. These files that you delete earlier will take a lot of storage in the trash until you do not remove them from here. Click on trash button and delete all.