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Mac System Data is large: What to do?

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Release: 2025-03-09 12:11:11
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This article explains how to manage large "System Data" storage on a Mac. It starts by defining System Data as temporary files, caches, logs, and backups crucial for Mac operation but often consuming excessive space. The article then details how to check System Data usage in different macOS versions (Ventura and later, vs. Monterey and earlier). It notes that the category is called "Other" in older versions.

Mac System Data is large: What to do?

The article discusses typical System Data size (12-20GB for newer macOS versions, up to 30GB for older ones) and reasons for its growth (updates, app installations, cached files). It then presents several solutions:

  1. CleanMyMac: A third-party app for quickly removing temporary files and junk. Screenshots show its interface and the process of scanning and cleaning. The article highlights its ability to review files before deletion and manage document versions in graphic editors.

Mac System Data is large: What to do?

  1. macOS Optimize Storage Tool: The built-in tool is described as less effective for System Data, primarily focusing on user-created files rather than system files.

Mac System Data is large: What to do?

  1. Manual Cache Removal: Instructions are provided for manually deleting unnecessary cache files from the ~/Library/Caches folder. Users are cautioned to exercise care.

Mac System Data is large: What to do?

  1. Manual Log File Removal: Similar instructions are given for removing log files from ~/Library/Logs, again emphasizing caution.

Mac System Data is large: What to do?

  1. Downloads Folder Cleanup: The article advises sorting the Downloads folder by size to identify and delete large, unnecessary files.

Mac System Data is large: What to do?

  1. Time Machine Backup Removal: Instructions using Terminal commands (tmutil listbackups and sudo tmutil delete) are given for removing old Time Machine backups. Caution is advised to avoid deleting needed backups.

Mac System Data is large: What to do?

  1. Emptying the Trash: The importance of emptying the Trash to reclaim disk space is reiterated.

Mac System Data is large: What to do?

The article concludes by mentioning NovaBench for performance testing and Setapp, a subscription service offering the mentioned apps (CleanMyMac, CloudMounter). It emphasizes the importance of freeing up space and maintaining optimal Mac performance. A table summarizing the solutions is included at the beginning.

Mac System Data is large: What to do? Mac System Data is large: What to do?

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