How to Free Up Disk Space on Mac in 2026

Trying to figure out how to free up disk space on Mac? When storage is almost full, apps slow down, macOS updates fail, and even simple tasks start breaking. The good news is that you can usually recover several gigabytes without touching your important files.

This guide starts with the fastest built-in checks, then moves to the folders that usually consume the most space on macOS, and finally shows how NythyCleaner helps you visualize large folders, clear caches, clean Xcode leftovers, and spot duplicates. If iCloud is part of the problem, see how to free up iCloud Drive space on Mac.

Why Does Your Mac Run Out of Space?

Before diving into solutions, it helps to understand where the space goes. macOS accumulates data silently over time:

• System caches grow with every app update, browser session, and iCloud sync.
• Xcode and developer tools store gigabytes of derived data, old simulators, and device symbols.
• Browser data — history, cookies, local storage, and cached media — adds up across Safari, Chrome, Firefox, and others.
• Old downloads — forgotten .dmg installers, ZIP archives, and email attachments — pile up in ~/Downloads.
• Duplicate photos and videos often exist in multiple copies across folders.
• iOS backups stored locally can consume tens of gigabytes.
• Log files from the system and applications grow quietly in the background.

Understanding these sources helps you target the biggest wins first.

Step 1: Check What Is Using Space

The Built-in macOS View

Open Apple menu → About This Mac → Storage (on macOS Ventura and later: System Settings → General → Storage). This shows a color-coded bar with categories like System, Apps, Documents, and Other.

The problem? The "Other" and "System Data" categories are often vague and unhelpful. They can show 50 GB+ without any clear explanation.

A Better Way: Visual Treemap

For a detailed, folder-by-folder breakdown, you need a tool that scans the actual file tree. NythyCleaner provides an interactive treemap that shows every folder as a colored block proportional to its size. You can drill down into any directory, spot the largest culprits, and take action — all without leaving the app.

Step 2: Clear System and Application Caches

What Are Caches?

Caches are temporary files that apps create to speed up repeated operations. They are safe to delete — the app will simply regenerate them as needed. Over months of use, caches can consume 5–20 GB or more.

Manual Method

Open Finder, press Shift + Command + G, and navigate to:

~/Library/Caches

You will see dozens of folders, one per app. You can delete the contents of each folder (not the folder itself). Common large ones include:

• com.apple.Safari — Safari browser cache
• com.google.Chrome — Chrome cache
• com.spotify.client — Spotify offline data
• com.apple.dt.Xcode — Xcode build caches

For system-level caches, check /Library/Caches as well (requires administrator access).

Automated Method

NythyCleaner scans all of these locations in one pass. The System Cleanup feature categorizes everything — user caches, system caches, browser caches, logs, and temporary files — and lets you clean them with a single click. The scan takes seconds and shows exactly how much space each category uses before you commit.

Step 3: Remove Old Downloads and Large Files

The Downloads Folder Trap

~/Downloads is where macOS saves everything you download from the internet. Over time, it becomes a graveyard of installer packages, ZIP archives, PDFs, and forgotten attachments.

Open Finder, navigate to Downloads, and sort by Date Added or Size. Look for:

• .dmg files (disk images from app installations)
• .pkg files (installer packages)
• .zip and .tar.gz archives
• Large video files or attachments

Finding Large Files Everywhere

Large files hide in unexpected places — old movies in ~/Movies, huge Photoshop files in ~/Documents, or cached podcast episodes buried deep in Library folders.

NythyCleaner has a dedicated Large and Inactive Files scanner that checks Documents, Desktop, Downloads, Movies, Music, and Pictures for files above a size threshold or untouched for months. You can adjust the size and age presets, or pick a custom folder. Each file can be revealed in Finder, moved to Trash (recoverable), or permanently deleted.

Step 4: Clean Browser Data

Why Browser Data Matters

If you use Safari, Chrome, Firefox, or any Chromium browser, each one stores:

• Browsing history — every page you have visited
• Cookies — tracking and authentication data
• Form auto-fill data — saved passwords and addresses
• Local storage and IndexedDB — web app data
• Cached media — images, scripts, and videos

Across multiple browsers, this can add up to several gigabytes.

Manual Method

Each browser has its own settings to clear data:

• Safari: Safari → Settings → Privacy → Manage Website Data
• Chrome: chrome://settings/clearBrowserData
• Firefox: Settings → Privacy & Security → Cookies and Site Data

Automated Method

NythyCleaner scans all installed browsers at once — Safari, Chrome, Edge, Brave, Arc, Vivaldi, Opera, Firefox, and more. It detects history, cookies, form data, sessions, and local storage for each one. You check what you want to remove and clean everything in one action.

Step 5: Clean Xcode and Developer Data

If you are a developer, Xcode is likely your biggest space consumer. A single active project can generate gigabytes of derived data, and old simulator runtimes accumulate silently.

What to Clean

Manual Method

You can delete the contents of each folder via Finder or Terminal:

rm -rf ~/Library/Developer/Xcode/DerivedData/*
xcrun simctl delete unavailable

Automated Method

NythyCleaner offers a dedicated Xcode Cleanup page with over 20 scannable categories organized in groups: Build, Devices, Caches, Packages, Profiles, and User Data. Select what you want, scan to see the sizes, then clean. It also includes an option to purge unavailable simulators via simctl.

The Homebrew and Docker cleanup tabs are integrated in the same page, so you can manage all developer storage in one place.

Step 6: Find and Remove Duplicate Files

Duplicate photos, videos, and documents can waste gigabytes without you realizing it. You might have copied the same album to multiple folders, or imported the same photos twice.

How NythyCleaner Detects Duplicates

Unlike simple hash-based tools, NythyCleaner uses Apple Vision AI to detect visually similar media — not just identical byte-for-byte copies. It extracts a visual fingerprint from each image, and for videos, samples three key frames at 25%, 50%, and 75% of the duration.

Files with similar enough fingerprints are grouped together, and a similarity percentage is shown next to each file. The analysis runs entirely on your Mac — nothing is sent to the cloud.

Auto-select marks every copy except the most recently modified file in each group for deletion. You always keep at least one copy, and you can adjust the selection before confirming.

Step 7: Empty the Trash and Manage Snapshots

The Trash

Deleted files stay in the Trash until you empty it. This is easy to forget, and the Trash can hold tens of gigabytes.

Empty it with Shift + Command + Delete, or from Finder: Finder → Empty Trash.

Time Machine Local Snapshots

If you use Time Machine, macOS keeps local snapshots on your boot drive. These are normally pruned automatically when space is low, but you can force-remove them:

tmutil listlocalsnapshots /
tmutil deletelocalsnapshots <date>

NythyCleaner can also manage APFS snapshots and thin them to reclaim space.

Step 8: Manage Startup Items and Background Processes

Apps that launch at startup consume memory and can slow down your Mac. NythyCleaner lists every login item, launch agent, launch daemon, Quick Look generator, and Spotlight importer on your system. You can enable or disable each one with a toggle.

Apple system services are filtered out automatically, and items in system-protected locations show a lock icon. This helps you identify forgotten helper tools and daemons that waste resources.

Step 9: Automate Future Cleanup

Instead of repeating these steps manually, you can schedule automatic cleanup. NythyCleaner offers Scheduled Cleanup with four frequency options — daily, weekly, biweekly, or monthly.

It installs a lightweight macOS launch agent that wakes the app periodically. The selected categories (user caches, logs, temporary files, Xcode data, Homebrew leftovers, Trash) are cleaned automatically, and a macOS notification summarizes the results.

Frequently Asked Questions

How much space can I expect to recover?

It depends on your usage, but most users recover 10–50 GB on a first cleanup. Developers with Xcode often reclaim 30 GB or more from derived data and old simulators alone.

Is it safe to delete caches?

Yes. Caches are temporary by design — apps and the system regenerate them as needed. You may notice slightly slower first launches after clearing caches, but everything returns to normal quickly.

Will cleaning browser data log me out of websites?

If you clean cookies, yes — you will need to log in again. NythyCleaner lets you choose exactly which categories to clean, so you can skip cookies if you prefer to stay logged in.

Does NythyCleaner delete files permanently?

For System Cleanup categories, files are deleted permanently (not moved to Trash). For the Large Files feature, you have the choice of Trash (recoverable) or permanent deletion. A confirmation always appears before any destructive action.

Do I need Full Disk Access?

Full Disk Access is recommended for the deepest scan. Without it, some system-level caches, logs, and databases may be inaccessible. You can grant it in System Settings → Privacy & Security → Full Disk Access.

Is NythyCleaner free?

Scanning and viewing results are free. Cleaning, deleting, and advanced features like scheduled cleanup require a Pro subscription. A free trial is available.

Conclusion

Keeping your Mac clean does not have to be tedious. Whether you prefer the manual approach or want to automate everything, the key is to target the biggest space consumers first: caches, developer data, browser files, and duplicates.

NythyCleaner makes the entire process fast, visual, and safe — from scanning to cleaning to scheduling future maintenance. Download it and reclaim your storage today.