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DaisyDisk for Mac is a powerful and intuitive disk space analysis tool. It visualizes disk usage through stunning sunburst charts, helping users quickly locate and manage files and folders that take up large amounts of space, thereby efficiently freeing up storage. This guide will introduce its core functions and complete operation process in detail. Whether you are a Mac novice or a seasoned user, mastering this tool will make your disk management effortless. Many friends are often at a loss when Mac storage space is low, and DaisyDisk is the perfect tool to solve this pain point.
After launching DaisyDisk, its interface is mainly divided into the following core areas:
Macintosh HD) or a specific folder (e.g., Users).After scanning is complete, you will enter the visual analysis chart interface.
| Problem | Possible Cause | Solution |
|---|---|---|
| Scanning is very slow | 1. The disk being scanned is extremely large with many files. 2. Scanning a network drive with unstable network. 3. Mac system resources (CPU/memory) are tight. |
1. Be patient, or scan specific subfolders (such as “Movies”). 2. Ensure stable network connection, or disconnect network drive scanning. 3. Close other resource-intensive applications. |
| Some folders cannot be accessed (shown as lock icon) | The folder is protected by System Integrity Protection (SIP) or has strict permission settings, and the current user account has no access rights. | This is normal. DaisyDisk respects system permissions. Usually these are core system files and are not recommended for ordinary users to delete. Please focus on analyzing user folders you have permission to access. |
| Space is not immediately freed after deleting files | 1. Files were moved to Trash and not permanently deleted. 2. Some application (such as Mail, iPhoto) library files exist as “packages”. After deleting internal items, space may be marked as reusable but the file size is not immediately reduced. |
1. Empty the Trash. 2. For application libraries, it is recommended to manage them within their applications (e.g., delete emails within Mail App). For standalone large files identified by DaisyDisk, deletion effects are immediate. |
| Cannot drag files into the collector | The selected item may be a protected system file or a file in use. | DaisyDisk will prevent operations on critical system files. Please select files you created or downloaded from the network for operations. |
| Software prompts for accessibility permissions | To scan certain system-protected directories, DaisyDisk requires macOS accessibility permissions. | Go to “System Preferences” -> “Security & Privacy” -> “Privacy” -> “Accessibility” and check DaisyDisk. This is a macOS security mechanism, please authorize with confidence. |
| Scan results do not match actual space | There may be hidden files (such as .DS_Store) or system snapshots (Time Machine local snapshots) not fully counted. | DaisyDisk scans most visible and hidden files by default. If you find a large discrepancy, try restarting your Mac and rescanning to clear temporary caches. |
| How to recover accidentally deleted files | If “Move to Trash” was selected during deletion, they can be recovered from the Trash. If “Permanently Delete” was selected, recovery is more difficult. | It is recommended to always use the collector function for secondary confirmation before deletion. For permanently deleted files, you can try third-party data recovery software, but success depends on whether the files have been overwritten. |
| How to switch the software interface language | DaisyDisk supports multiple languages, but switching requires modifying system language preferences. | Go to “System Preferences” -> “Language & Region” and set the preferred language to “Simplified Chinese”, then restart DaisyDisk. If you do not want to change the system language, you can look for language options in the software preferences. |
| Why is my external hard drive scanning very slowly |
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