How to Check Mac Disk Space

Check Mac Disk Space

Photo by Kevin Bhagat on Unsplash

Make Sure You Have Plenty of Free Mac Disk Space

You may think that if you have 120 GB of storage on your Mac, then you can use 119.9 GB without issues. Unfortunately, that’s not true. Your Mac needs free disk space to use so it can manage storage and memory. Further, some apps use some disk space for temporary storage. Thus, you need to keep a certain amount of your storage open and free to keep your Mac running speedy. It’s hard to know exactly how much you need, but many experts recommend approximately 15 percent remain free. So, let’s check Mac disk space.

Check Your Disk Space

Many Macs, such as MacBook Airs, don’t come with huge hard drives because of their compact sizes. Dealing with a full hard disk is never fun—nobody wants to delete things every time you download a new movie or album.
To check your free disk space,
  • Open Apple icon 
  • Select About this Mac 
  • Select Storage
macbook air running slow

Clean Your Mac

If you’re running low on storage, we recommend two actions,
  1. Download CleanMyMac 3 from MacPaw.
  2. Move large files to an external hard drive.
CleanMyMac 3 is simple: it rids your MacBook Air of useless junk files, thus giving you more storage space. 
Though there are many software programs out there, CleanMyMac 3 is the most popular among the Mac user communityIt won reader’s choice awards from thanks to its ability to fix issues for hundreds of thousands of Mac users around the world. Best of all, you can try it for free and see what you think. 


Save space on your HDD with CleanMyMac 2!

If you have many large files (movies, music, photographs, etc.) sitting on your hard drive, you’re likely to see a decrease in speed. An external drive will relieve your Mac from storing huge files and once it’s not a parking garage, you’ll notice the speed and performance increase. We recommend Western Digital external hard drives for most Mac users.
About the Author
Kylie Larson is a content wrangler, helping both small businesses and large organizations get their message up and out. When she's not writing and organizing online, you'll find her walking the dog, with a camera in hand, riding the Chicago blue line, and in the midst of a home renovation project that never ends. Connect with her at

Leave a Reply


Anti-Spam Quiz: