Mac Storage Tips for Video Editors: Free Up Space Without Touching Projects (2026)

If your Mac's storage bar has turned angry red, you already know the feeling: a 2-TB internal drive that somehow still shows only 12 GB free, and the last thing you want is to accidentally delete footage you cannot get back. These mac storage tips for video editors focus on the files you can safely erase — render caches, proxy media, motion-graphics templates, stale backups, and developer detritus — while leaving every project, sequence, and original clip completely intact. The techniques below apply whether you're running Final Cut Pro on an M4 Max or grinding through Premiere on an older Intel machine with macOS Sequoia or the upcoming Tahoe release.

Why Video Editing Devours Storage So Quickly

Video work generates far more than just the footage you intentionally import. Every modern NLE quietly builds parallel file hierarchies that can match or exceed the size of your source media:

• Render files — pre-computed frames stored so the timeline plays back without dropping frames.
• Proxy media — lower-resolution copies transcoded for editing on the go that are often left behind after the online edit is done.
• Waveform and peak files — tiny but numerous per-clip audio analysis files.
• Motion graphics caches — baked particles, titles, and effects that rebuild automatically when deleted.
• Thumbnail and preview databases — generated by the Finder, Photos, and media browsers.

None of these files are your project or your media. They are all regenerable. Knowing that is the foundation of safe storage recovery.

Final Cut Pro: Deleting Generated Media and Libraries

Final Cut stores its generated content inside the library bundle itself (when using managed libraries) or in a companion folder next to an external library. The safest official path is through the app:

1. Open Final Cut Pro and select the library in the sidebar.
2. Go to File > Delete Generated Library Files…
3. Check Render Files, Optimized Media, and Proxy Media. Leave Original Media unchecked.
4. Click OK. Final Cut deletes only what it regenerated; your originals are never touched.

For libraries on external drives, Final Cut sometimes parks generated content in ~/Movies/Motion Templates.localized/ or inside the library bundle at [Library Name].fcpbundle/[Event]/Render Files/. You can inspect the bundle's size with:

du -sh ~/Movies/MyProject.fcpbundle/

If that number is shockingly large, the in-app delete command above is the right remedy.

Adobe Premiere Pro and After Effects Caches

Adobe applications scatter caches across your system. The main offenders and their default locations are listed in the table below.

In Premiere, go to Preferences > Media Cache and click Delete Unused or set an automatic cleanup threshold. For After Effects, Edit > Purge > All Memory & Disk Cache clears the disk cache immediately. These are rebuild-on-demand caches — deleting them costs you a few seconds of re-rendering the next time you open the project, nothing more.

Proxy Media Left on Disk After Delivery

Proxy workflows are a lifesaver on set but a storage problem after the edit is locked. If you used proxy media in Premiere or Final Cut and have already delivered, those proxies are just duplicates.

• Final Cut Pro: Use File > Delete Generated Library Files > Proxy Media as described above.
• Premiere Pro: Proxies live wherever you told the Ingest Settings to put them — check Preferences > Ingest Settings for the path, then delete the folder after you confirm the project is offline-reconnected to originals.
• DaVinci Resolve: Right-click the bin in the Media Pool and choose Delete Optimized Media, or remove files directly from the path shown in Project Settings > Master Settings > Working Folders.

System and Developer Junk That Accumulates Silently

Video editors who also write scripts, use Python environments for automation, or keep Xcode around for plug-in development end up with a second layer of hidden bulk. A general overview of what is taking up space on your Mac can surface these in minutes.

Xcode Derived Data and Archives

If Xcode is installed for any reason, its derived data folder grows every time a project is built:

• ~/Library/Developer/Xcode/DerivedData/ — safe to delete entirely; Xcode rebuilds on next compile.
• ~/Library/Developer/Xcode/Archives/ — compiled app archives; only delete versions you no longer need to distribute.
• ~/Library/Developer/CoreSimulator/Devices/ — iOS simulator images, often 10–30 GB each.

See the deeper breakdown in our guide on why Xcode takes up so much space.

Python Environments and Package Caches

Automation scripts for batch transcoding, color pipeline tools, and AI-upscaling utilities often install Python packages that leave caches behind:

• ~/Library/Caches/pip/ — pip's HTTP and wheel cache. Delete freely.
• ~/.pyenv/versions/ — pyenv-managed interpreter copies; remove old versions with pyenv uninstall [version].
• ~/.venv/ or any project-local virtualenv — safe to delete and recreate with python3 -m venv .venv.

Homebrew and Node.js

Homebrew caches downloaded bottles even after installation:

brew cleanup --prune=all

This single command reclaims the download cache at ~/Library/Caches/Homebrew/ without removing any installed formulae. If you have Node.js installed for any web-based tooling, node_modules folders inside old projects can be multi-gigabyte dead weight — they are always recreatable with npm install.

How to Audit and Clear in One Pass (Step-by-Step)

Rather than hunting folder by folder, you can do a systematic sweep in under 30 minutes:

1. Quit all video applications so no process is writing to the cache folders you're about to inspect.
2. Open Terminal and run du -sh ~/Library/Caches/ to get a baseline. Anything over 5 GB warrants a closer look.
3. Run du -sh ~/Library/Caches/Adobe/ to isolate Adobe's contribution.
4. In Final Cut, run the Delete Generated Library Files workflow for every library you haven't opened in 90 days.
5. In Premiere, set the media cache to auto-delete files older than 60 days (Preferences > Media Cache > Automatically Delete Cache Files Older Than).
6. Run brew cleanup --prune=all if Homebrew is installed.
7. Delete ~/Library/Developer/Xcode/DerivedData/ if Xcode is present.
8. Restart the Mac so the OS can reclaim memory-mapped swap files.

A tool like Crumb can audit all of these locations at once and show exactly what's safe to remove before you delete anything — useful if you'd rather not run commands by hand.

What Not to Delete

A few locations look like caches but are actually important:

• ~/Library/Application Support/Final Cut Pro/ — stores preferences, keywords, smart collections, and custom roles. Leave it alone.
• ~/Movies/[Library].fcpbundle/CurrentVersion.fcpevent — this is your actual project data inside the bundle. Never touch this directly.
• ~/Library/Application Support/Adobe/Premiere Pro/[version]/ — contains keyboard shortcuts, workspaces, and auto-save projects. Back it up before any major cleanup.
• Any folder named Originals or Original Media inside a Final Cut library bundle — this is your managed media.

When in doubt, move files to an external drive and wait two weeks rather than deleting immediately. If nothing breaks, remove them for good.

Keeping Storage Under Control Going Forward

The editors who never hit the storage wall follow a few habits:

• Set Adobe media caches to a dedicated scratch drive and cap the size in preferences.
• After delivery, run the in-app "delete generated files" command as part of the project wrap-up checklist.
• Use external libraries in Final Cut so renders stay off the boot drive automatically.
• Review ~/Library/Caches/ monthly — most subfolders under it are application caches that rebuild on demand.
• Keep a note of which Python or Homebrew tools you installed; uninstall them when a project is done to avoid accumulation.

Storage hygiene for video editors is less about a single dramatic cleanup and more about knowing which files exist for convenience versus which ones are irreplaceable. With the right mental model, you can reclaim tens of gigabytes without ever opening a project file.