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Sloth

Sloth is a native Mac app that shows all open files, directories, sockets, pipes, and devices in use by all running processes on your system. This makes it easy to inspect which apps are using which files, etc.

  • View all open files, directories, IP sockets, devices, Unix domain sockets, and pipes
  • Filter by name, access mode, volume, type, location, or using regular expressions
  • Sort by process name, file count, type, process ID, user ID, Carbon PSN, bundle UTI, etc.
  • View IP socket status, protocol, port and version
  • View sockets and pipes established between processes
  • Inspection window with detailed macOS and Unix file/socket/process info
  • Powerful contextual menu for file operations
  • In-app authentication to run with root privileges
  • Very fast, responsive native app written in Objective-C/Cocoa

Sloth is essentially a friendly, exploratory graphical user interface built on top of the lsof command line tool. The output of lsof is parsed and shown in a sortable, searchable outline view with all sorts of convenient additional functionality. Check out the screenshots below.

Download

Sloth is free, open source software and has been continuously developed and maintained for a very long time (since 2004). If you find this program useful, please make a donation.

Sloth can also be installed via Homebrew (may not be the latest version):

brew install --cask sloth

If you need to run it on 10.9-10.12, version 3.2 works just fine. Older versions supporting macOS 10.8 and earlier can be downloaded here.

Screenshots

View open files

Sloth Screenshot 1 - Files

View IP sockets

Sloth Screenshot 2 - IP Sockets

View sockets and pipes between processes

Sloth Screenshot 3 - Pipes and Unix Sockets

Build

Sloth can be built using a reasonably modern version of Xcode via the xcodeproj or by running the following command in the repository root (requires Xcode build tools):

make

Built products are created in products/.

BSD License

Copyright (c) 2004-2024 Sveinbjorn Thordarson <sveinbjorn@sveinbjorn.org>

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.