Sloth

sloth · v3.6 • auto-updates

8.0

Displays all open files and sockets in use by all running processes

Developer Tools macOS 11+ Homepage →

brew install --cask sloth

Compare with: vs. Mac Monitor vs. osquery vs. FileMonitor vs. ProcessMonitor

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Install trend

Trust Score 7/10

✓ Open source (BSD-3-Clause) +3

✗ Active development +0

✓ Licensed +1

✓ Auto-updates +1

✓ Not deprecated +1

✓ Established (>1yr) +1

✗ Low installs +0

Version History

v3.6

9d ago3.5→3.6

Review

Mar 10, 2026

Sloth is a powerful macOS utility that provides a graphical interface for viewing all open files, directories, sockets, and other system resources in use by running processes. It offers real-time monitoring and filtering capabilities, making it an essential tool for developers and system administrators who need to troubleshoot or understand system resource usage.

Sloth displays all open files, directories, sockets, pipes, and devices in use by running processes on macOS.

Maturity: The project is mature with active maintenance, evidenced by its popularity and regular updates, though it has a few open issues.

Community: Sloth has received significant positive attention on Hacker News, with users praising its utility as a must-have tool for system monitoring and debugging.

Pros

+ Provides a user-friendly GUI for system resource monitoring, making it accessible to both developers and non-technical users.
+ Real-time updates and filtering capabilities enhance its utility for troubleshooting and system analysis.
+ Open-source with a permissive BSD-3-Clause license, fostering community contributions and transparency.

Cons

- The app icon display issue on certain macOS versions may affect user experience.
- While the GUI is helpful, some users might prefer the command-line functionality of lsof.