---
id: mac-storage-basics.how-do-i-reduce-system-data-on-a-mac
url: https://storagestudio.us/faq/mac-storage-basics/how-do-i-reduce-system-data-on-a-mac
category: "Mac storage basics"
subcategory: "System Data and the storage categories"
question: "How do I reduce System Data on my Mac safely?"
alt_questions:
  - "how to clear system data mac"
  - "reduce system data storage"
  - "delete system data macbook"
  - "shrink system data macos"
  - "clean system data safely"
  - "get rid of system data mac"
short_answer: "Restart, release local snapshots, clear rebuildable app caches, remove old device backups and clean developer data. Don't delete files in system folders by hand."
tags: ["system data", "cleanup", "caches", "snapshots"]
related: ["https://storagestudio.us/faq/mac-storage-basics/why-is-system-data-so-large", "https://storagestudio.us/faq/mac-storage-basics/is-it-safe-to-delete-caches-on-a-mac", "https://storagestudio.us/faq/mac-storage-basics/what-are-local-snapshots-on-a-mac"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# How do I reduce System Data on my Mac safely?

You can't delete System Data as a whole, but you can shrink its biggest parts safely. Work from least risky to most:

1. **Restart** — clears swap and many temporary files.
2. **Release local snapshots** if you've recently deleted or moved a lot (see [local snapshots](https://storagestudio.us/faq/mac-storage-basics/what-are-local-snapshots-on-a-mac)).
3. **Clear app caches** from apps that rebuild them (browsers, chat and editor apps).
4. **Remove old iPhone backups** and leftover update files.
5. **Clean developer data** with each tool's own cleanup command.

Avoid deleting anything inside /System or random Library folders by hand.

Storage Studio's Free Up Space and What's Using Space do steps 2–5 with a review first and keep anything they remove recoverable in the Recycle Vault. See [freeing up space](https://storagestudio.us/faq/freeing-space/).