How to clear cache on a MacBook Air with little storage
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These steps work on every MacBook Air, from Intel models to M1, M2, M3 and M4, on macOS Ventura and later.
The short answer
- Quit every open app.
- In Finder, press Shift-Command-G, type
~/Library/Cachesand press Return. - Open the largest app folders and move what’s inside them to the Trash. Keep the folders.
- In Safari, press Option-Command-E to empty its cache.
- Empty the Trash and restart your MacBook Air.
Why cache matters more on a MacBook Air
Cache works the same on every Mac. What changes on an Air is the room you have. Base models since the M1 come with 256 GB, and older Intel models often have 128 GB. After macOS, your apps and your photos, there is little space to spare.
Signs your Air needs a cache cleanup
- A “Your disk is almost full” warning appears.
- A macOS update says it needs more space to install.
- System Data in Storage settings keeps growing.
- Apps freeze or beachball when your disk is nearly full.
Why a full disk slows an Air down
When memory runs short, macOS moves data to swap files on your disk. On an 8 GB MacBook Air, it does this often. A nearly full disk leaves no room for swap, so apps stall. Clearing cache gives macOS that room back.
Check your storage first
- Choose Apple menu, then System Settings, then General, then Storage.
- Note the available space at the top.
- Hold the pointer over the coloured bar. Caches count towards System Data.
On macOS Monterey or earlier
Choose Apple menu, then About This Mac, then Storage.
If the bar says Calculating
macOS is still adding up your files. Leave the window open for a few minutes. On a nearly full disk, it can take longer than usual, so note the number once it settles and use it to measure your progress.
How to clear cache on a MacBook Air step by step
1. Clear app caches in Finder
Open the Caches folder
Quit your apps, then in Finder choose Go, then Go to Folder. Type ~/Library/Caches and press Return.
Sort folders by size
Choose View, then as List. Open View, then Show View Options, tick Calculate all sizes and click the Size column. The biggest cache folders rise to the top.
Clear the biggest folders
Open a large folder, press Command-A and then Command-Delete. Leave the folder itself in place. Skip anything macOS says is in use.
2. Empty your browser caches
Safari
Turn on Show features for web developers in Safari’s Advanced settings, then choose Develop, then Empty Caches. Our guide on clearing Safari cache on a Mac covers every option.
Chrome, Firefox and Edge
Press Shift-Command-Delete, tick only the cache option and confirm. You stay signed in to your sites.
3. Clear caches inside your apps
Streaming and chat apps often hold the largest caches on an Air. Clear them from the app, so it doesn’t rebuild them straight away:
- Spotify: Settings, then Storage, then Clear cache. Remove offline playlists you no longer play.
- Slack: Help, then Troubleshooting, then Clear Cache and Restart.
- Apple Music: remove downloaded songs you don’t need offline. Right-click an album and choose Remove Download.
4. Empty the Trash and restart
Cached files keep using space until you empty the Trash. Restart afterwards, so macOS also clears its temporary files and releases swap space.
The caches that fill a MacBook Air most
| Source | Where to look | How to clear it |
|---|---|---|
| Web browsers | ~/Library/Caches/Google, com.apple.Safari | Clear from browser settings |
| Spotify and Apple Music | ~/Library/Caches/com.spotify.client | Clear in app settings |
| Messaging apps | Slack, Teams and Discord caches | Clear Cache and Restart |
| Software updaters | ~/Library/Caches/*.ShipIt | Delete once the app updates |
| Removed apps | Folders named after apps you deleted | Delete the whole folder |
What not to delete on a MacBook Air
- /System/Library/Caches and /Library/Caches. Leave these to macOS.
- Your Photos Library. Its thumbnails are part of the library, not a cache you can remove.
- iCloud Drive files. Deleting a synced file removes it from iCloud and your other devices too.
How much free space should a MacBook Air keep?
Apple doesn’t publish a fixed number, but macOS needs room to work. Major macOS updates often ask for tens of gigabytes while they install, and swap files grow whenever memory runs short.
As a rule of thumb, keep at least 10 to 15 percent of your disk free. On a 256 GB MacBook Air, that means roughly 25 to 40 GB. If you sit below that, clear cache first, because it is the quickest space to win back.
How to clear cache on a MacBook Air running an older macOS
Older Intel MacBook Air models with 128 GB feel space pressure the most. The Caches folder sits in the same place, so the Finder steps above work on every version. Two things differ:
- Safari settings are called Preferences, and the checkbox reads Show Develop menu in menu bar.
- Safe Mode starts when you hold Shift as your Mac restarts, instead of the power-button method Apple silicon uses.
Keep caches small on a 256 GB Air
Use Storage recommendations
In System Settings, then General, then Storage, macOS lists recommendations under the bar. Turn on Empty Trash Automatically so cleared caches don’t sit in the Trash for weeks. macOS then deletes items that have been in the Trash for 30 days.
Turn on Optimise Mac Storage
Open System Settings, click your name, then iCloud, then Drive, and turn on Optimise Mac Storage. macOS keeps older files in iCloud and downloads them when you open them.
Limit offline downloads
Streaming apps cache everything you download for offline use. Keep a small offline selection and stream the rest.
Check every few months
Caches grow back, and that is normal. A quick check every few months, or whenever storage runs low, is enough.
If cache isn’t the problem, our guide on how to free up space on a Mac lists 14 more ways to make room. For a full explanation of every cache type, read how to clear cache on a Mac. Using a MacBook Pro as well? See how to clear cache on a MacBook Pro.
See every cache on your Air with MyMacStorage
MyMacStorage scans your whole MacBook Air and lists caches, build files and old installers with their sizes, so you clear the biggest first. Everything goes to the Trash, and Undo puts it back.
Learn more about MyMacStorage, the disk cleanup app for Mac. It costs $19.99 once, with no subscription.
Frequently asked questions
How do I clear cache on my MacBook Air quickly?
Quit your apps, press Shift-Command-G in Finder and go to ~/Library/Caches. Move the contents of the largest app folders to the Trash, empty it and restart.
How much space does clearing cache free on a MacBook Air?
It depends on how you use it. A few hundred megabytes is common, and several gigabytes is possible if you stream music offline or use many browsers. Check Storage settings before and after to see your own result.
Is clearing cache on a MacBook Air different from other Macs?
No. The steps are identical on every Mac. The difference is how much it matters: on a 256 GB MacBook Air, a few gigabytes of cache can decide whether a macOS update installs.
Will clearing cache make my MacBook Air faster?
Only if your disk is nearly full. macOS needs free space for virtual memory and updates, so a full drive slows everything down. With plenty of free space, clearing cache doesn't change speed.
How do I clear cache and cookies on my MacBook Air?
Clear app caches in Finder as this guide shows, then clear cookies inside each browser. In Safari, open Settings, then Privacy, then Manage Website Data, and click Remove All. Expect to sign in to sites again.
Can I clear cache on a MacBook Air automatically?
macOS clears some caches itself when storage runs low. For the rest, check your Caches folder once every few months, or use a cleanup app that lists every cache with its size.
Does the M1, M2, M3 or M4 chip change anything?
No. The chip only changes how you start in Safe Mode. Every other step is the same on Apple silicon and Intel models.