How to clear System Data on Mac and free up storage space
How to clear System Data on Mac and free up storage space
https://www.macworld.com/article/676493/how-to-delete-system-data-mac.html
Publish Date: 2026-05-11 11:51:00
Source Domain: www.macworld.com
Summary created by Smart Answers AI
In summary:
- Macworld explains how to safely reduce System Data storage on Mac, which includes caches, temporary files, iOS backups, and AI model files that can exceed 100GB.
- Managing System Data is crucial for Mac performance, especially on smaller 256GB SSDs where storage limitations cause slowdowns and prevent updates.
- Safe removal methods include deleting old Time Machine snapshots, iOS backups, .dmg files, and clearing caches while avoiding core system files. Detailed instructions are provided below.
If your Mac is warning that you are running out of storage, you need room for a macOS update, or your Mac simply seems to be slowing down, you may have looked at the large chunk of storage labelled System Data and wondered if you can safely delete it to save space on your Mac.
Low storage can cause all kinds of problems on a Mac – you might see warnings that your startup disk is almost full, struggle to install macOS updates, notice performance slowdowns, or in extreme cases even have trouble starting up your Mac. Maintaining at least 10% of your total storage as free space is generally recommended to ensure your Mac continues to run smoothly.
So what exactly is System Data, why can it grow so large, and is it safe to remove anything from it? The answer is yes — at least some of it. Just beware that deleting some files from System Data could seriously damage your installation of macOS, so we recommend that you backup your Mac before deleting anything, just in case!
In this guide, we’ll explain what’s included in System Data, why it can take up so many gigabytes, and the simple steps you can take to delete System Data and reclaim space on your Mac. If you aren’t sure how to see how much disk space your Mac has read: How to check how much disk space you have.
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