---
id: mac-storage-basics.what-is-application-support-folder
url: https://storagestudio.us/faq/mac-storage-basics/what-is-application-support-folder
category: "Mac storage basics"
subcategory: "Apps and macOS itself"
question: "What is the Application Support folder, and why is it so big?"
alt_questions:
  - "application support huge mac"
  - "library application support size"
  - "can I delete application support"
  - "app data folder mac"
  - "application support folder contents"
short_answer: "It holds apps' working data — databases, downloads, plug-ins — often the only copy. Remove folders of uninstalled apps and use apps' own settings to clear caches."
tags: ["application support", "library", "apps"]
related: ["https://storagestudio.us/faq/mac-storage-basics/where-are-cache-files-stored-on-a-mac"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What is the Application Support folder, and why is it so big?

`~/Library/Application Support` is where apps keep their working data: databases, downloaded content, offline files, plug-ins and sometimes caches. Chat apps, editors, music software and browsers can each keep many gigabytes here.

Unlike Caches, this folder often holds the **only copy** of an app's data, so don't empty it. Look for folders of apps you've uninstalled, and use each app's own settings to clear its cache or downloads. Storage Studio's What's Using Space names the app behind big folders here when it can, and says when it can't tell.