How to Clear Storage on macOS: 2026 Guide
How to Clear Storage on macOS: 2026 Guide
Cleaning up storage on macOS is often seen as nothing more than deleting a few large files, but the real space hogs usually work more quietly: forgotten iPhone backups, browser caches, old app leftovers, downloaded update files, video projects, message attachments, and system data that never appears in Finder. In 2026, storage management has become even more important for Mac users because apps have grown larger, photo and video files have become heavier, and AI-powered tools now keep local files and model caches. If your MacBook has a 256 GB or 512 GB drive, seeing the “Your disk is almost full” warning after just a few months is no longer surprising.
The first place to check should be macOS’s own storage screen. Open System Settings from the Apple menu, go to General > Storage, and you can see which categories are filling up your Mac’s disk. Apps, Documents, Photos, iCloud Drive, Messages, and System Data are listed separately here. This screen is not perfect, especially because System Data can sometimes look too vague, but it is a good starting point for cleanup. The goal is not to delete everything at random; it is to understand which section has actually grown too large. If Photos shows 180 GB, the solution is one thing. If Applications shows 90 GB, the solution is another. If System Data shows 120 GB, you need a completely different approach.
The safest way to free up space quickly on a Mac is to find large files. Open Finder, go to File > Find, set the search type to “File Size,” and list files larger than, for example, 1 GB. Old .dmg installer files, finished video exports, ZIP archives, virtual machine disks, and ISO files downloaded years ago will stand out immediately. The Downloads folder in particular is like a hidden junk room on a Mac. DMG files left behind after installing apps can remain there for years for many users. Similarly, video files dropped onto the desktop can bloat both the local drive and the cloud if iCloud syncing is enabled.
Emptying the Trash sounds simple, but it is still one of the most commonly skipped steps. On a Mac, deleting a file does not truly remove it from the disk; as long as it stays in the Trash, it continues to take up space. Files deleted from external drives can also sometimes remain in their own hidden trash folders. After a major cleanup, you may not see the change in the storage screen until you empty the Trash. A small habit helps here: once a month, check your Downloads folder, delete unnecessary installer packages, and then empty the Trash. A five-minute task can sometimes recover 20–30 GB of space.
When cleaning up apps, deleting only the icon may not be enough. Many macOS apps leave support files in the Library folder. If you no longer use an app, uninstall it normally first, then open Finder, click the Go menu, hold the Option key, and enter the Library folder. In Application Support, Caches, Containers, and Preferences, you may find leftovers named after the app you removed. Be careful in these folders; do not delete system files unless you are sure what they are. With large apps, especially video editing tools, games, development tools, and design software, these leftovers can take up serious space. If you are also exploring how visual settings affect system behavior on a Mac, the macOS Tahoe 26 Liquid Glass Settings Guide can help you separate visual preferences from deeper system behavior.
Cache cleanup still helps in 2026, but overdoing it can backfire. Safari, Chrome, Edge, Spotify, Teams, Slack, Xcode, Photoshop-like apps, and many others cache frequently used data. These files help apps open faster, so not every cache is bad. However, browser data that has built up for months, old media previews, and cache folders from development tools can grow unnecessarily large. Clearing history and website data in Safari is a good start. In Chrome, use Settings > Privacy and security > Clear browsing data. You can also open ~/Library/Caches in Finder and check large folders by app. Instead of blindly deleting the entire folder, it is healthier to focus on obviously old or unusually large app caches.
iPhone and iPad backups can take up a surprising amount of space on a Mac. If you backed up your device through Finder, old backups may still be sitting on the disk. If you see iOS Files or a similar category in the Storage screen, make sure to review it. A backup from the same device three years ago may no longer be useful today. Especially if you use a 128 GB or 256 GB iPhone, a single backup can consume tens of gigabytes on your Mac. Once you are sure you have a current backup, removing old ones is usually a safe cleanup step.
The Photos app needs separate attention. Instead of digging directly into the photo library through Finder, it is better to clean it from inside the Photos app. Check duplicate photos, delete unnecessary screenshots and large videos, then empty the “Recently Deleted” section inside Photos as well. If you use iCloud Photos, the “Optimize Mac Storage” option can provide serious relief. This setting keeps the original high-resolution files in iCloud and leaves lighter versions on your Mac. However, if your internet connection is weak or you need offline access to your entire library, make that choice accordingly.
The Messages app also grows quietly. Videos, PDFs, screen recordings, and images sent by friends can take up not just a few gigabytes, but sometimes tens of gigabytes when stored for years. You can open the Messages category in the Storage section of System Settings to view large attachments. If you do not want to delete old conversations entirely, removing only heavy attachments makes more sense. The Mail app can have a similar problem. Emails with large attachments, especially on work accounts, may be stored on the local disk. Reviewing Mail’s attachment download behavior and archiving unnecessary old emails can reduce storage pressure.
For developers, cleanup becomes a little more technical. If you use Xcode, DerivedData, Archives, DeviceSupport, and simulator files can grow enormous over time. Docker images, Homebrew cache files, and npm or pnpm package caches also consume space in the same way. If you know how to use Terminal, cleaning these areas in a controlled way can be very effective. But running random delete commands from the command line is risky. For users who want to get more comfortable with command-line logic, the Beginner's Guide to Learning Linux Commands can also give Mac users a useful foundation for understanding what they are doing in Terminal.
Virtual machines and emulators are often the real cause of a storage crisis. If you use Parallels, VMware, UTM, VirtualBox, or Android Studio emulators, each virtual disk can take up tens of gigabytes. Deleting old Windows, Linux, or test environments you no longer use can free up a large amount of space. Before deleting a virtual machine through Finder, removing it from the app’s own interface usually gives cleaner results. If you want to understand virtualization better, What is VirtualBox and How to Use It? explains why these files can become so large.
System Data is the most confusing category. It can include log files, temporary files, local Time Machine snapshots, app support files, old update fragments, and macOS’s own working data. Trying to completely reset System Data is not realistic; macOS already manages part of it when needed. Still, local Time Machine snapshots can sometimes take up too much space. If you back up with Time Machine to an external drive and that drive has not been connected for a long time, your Mac may keep local snapshots. Connecting your external backup disk and waiting for the backup to complete can automatically relieve part of this space.
It is worth being cautious with cleanup apps. There are many “one-click Mac cleaner” tools on the market. Some genuinely make it easier to find large files, while others clean too aggressively and may remove session data, app settings, or cache files you actually need. If you use a cleanup tool, choose one that shows exactly what it will delete, asks for confirmation before taking action, and does not blindly dive into system folders. The main rule is simple: do not delete files you do not understand. In Library, System, and hidden folders in particular, judging by the file name alone can be misleading.
Instead of turning storage cleanup into one big operation, it is better to make it a small maintenance habit. Cleaning the Downloads folder once a month, checking large files every three months, removing unused apps, and reviewing the photo and video archive a few times a year is usually enough. Keeping at least 10–15% free space on your Mac is also helpful for performance. When the disk gets close to full, apps open more slowly, updates cause problems, swap space becomes tight, and the system gets clogged more quickly during heavy work such as video editing.
A safe cleanup order can look like this: first, find the largest category in the Storage screen; then sort out large files in Finder; then empty the Trash. After that, remove apps you no longer use, clean browser and app caches carefully, and review old iPhone backups and Messages attachments. If your photo library is large, reduce duplicates and videos. If you use virtual machines, Docker, Xcode, or emulators, the biggest gain will probably come from there. When you repeat this routine every few months, your Mac does not just regain free space; it also feels less cramped during updates and everyday use. Storage cleanup is a bit like tidying a home: the point is not to throw everything away, but to separate what you actually need from what is only taking up space.
