Sloth

Sloth is a Mac application that displays all open files and sockets in use by all running processes on your system. This makes it easy to inspect which apps are using which files and sockets.

View all open files, directories, IP sockets, devices, sockets and pipes
View IP socket status, protocol and version
Filter by name, access mode, volume, type, location, or using regular expressions
Sort by name, process ID, user etc.
Inspection window with detailed macOS and Unix file/socket info
Powerful contextual menu for file operations
Authenticate to run with root privileges

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

Sloth is free, open source software and has been maintained for a long time. If you find this program useful, please make a donation.

Download

⇩ Download Sloth 2.7 (~0.6 MB, Intel 64-bit, 10.8 or later)

Screenshots

Version history

10/02/2019 - Version 2.7

Info Panel now shows file Uniform Type Identifier
Fixed crash bug on macOS 10.9 and earlier
Various minor bug fixes and interface improvements

26/09/2018 - Version 2.6

New and improved contextual menu
Fixed quirks with macOS Mojave's "Dark Mode"
Various user interface improvements

02/06/2018 - Version 2.5

Fixed critical lsof output parsing bug introduced in 2.4
New "Authenticate on launch" option in Preferences
Various minor interface refinements

10/05/2018 - Version 2.4

Now defaults to showing Mac-friendly process names (e.g. "Safari Web Content" instead of "com.apple.WebKit.WebContent")
Unix process names no longer truncated to 32 characters
Search filter can now be used to filter by IP protocol (e.g. TCP or UDP) or IP version (e.g. IPv4 or IPv6)
Now shows TCP socket state (e.g. LISTEN, ESTABLISHED) in list and Info Panel
Info Panel now shows file descriptor integer
Info Panel now shows additional info for character devices
Info Panel now shows Carbon Process Serial Number (PSN) for processes, if available
Much improved IPv6 socket handling
DNS to IP and port name resolution in Info Panel when DNS/port lookup enabled in Prefs
Minor user interface enhancements

16/04/2018 - Version 2.3

Now supports access mode filtering (e.g. read, write, read/write)
Search filter now also filters by PID
DNS and port name lookup for IP Sockets in Info Panel
Info Panel now identifies standard I/O stream character devices
New Search Filter menu with case sensitivity and regex options
New application icon
Fixed bug where Volumes filter wouldn't work
Minor interface improvements

07/03/2018 - Version 2.2

Now defaults to excluding process binaries, shared libraries and current working directories in listing
DNS and port name lookup now disabled by default for faster execution (can be enabled in Preferences)
Info Panel now displays file access mode and process owner
New sort option: User ID
Info Panel now shows IP socket protocol and version
New Preferences window
New high-resolution pipe and socket icons
Fixed bug where sort settings were not respected on launch

12/02/2018 - Version 2.1

Copying a file path now creates a file representation in clipboard in addition to text
File paths are now red in colour if selected file does not exist at path
Uniform Type Identifier now used to identify app bundles instead of .app suffix
Fixed issue with Info Window's handling of moved or non-existent files
Minor interface refinements

01/10/2017 - Version 2.0

New Volumes filter
New "Sort By" submenu under View in main menu
Sorting by PID now correctly does numerical sort instead of alphabetic

07/06/2017- Version 1.9

Files can now be dragged and dropped
Cmd-F now focuses on filter field
File representations can now be copied to the clipboard
Cmd-double-click now reveals file in Finder
Fixed various minor user interface bugs
Fixed collapse all bug with Info Panel open
New compact interface size option
Fixed broken permissions display for non-bundle processes in Info Panel

03/05/2017 - Version 1.8

Sloth is now code-signed
QuickLook now works from the Info panel
Minor user interface improvements

17/06/2016 - Version 1.7

New Info Panel for items
Minor UI changes

24/02/2016 - Version 1.6

Asynchronous refresh
Much improved performance
UI improvements
New filtering options
Smarter regex filtering
Load results as root without relaunching application
Expanded sorting options
Migrated project to ARC, modern Objective-C and Xcode 7
Substantial rewrite
Now requires OS X 10.8 or later

08/07/2010 - Version 1.5

Column sorting, column rearrangement
Several bug fixes
Copy/drag and drop selected items

29/05/2009 - Version 1.4

Regular expressions in search filter
New "Relaunch as root" option
Fixed bug in Mac OS X 10.5
Now built for Mac OS X 10.4 or later

28/07/2006 - Version 1.3.1

Released as a Universal Binary

05/03/2004 - Version 1.3

Live update for search filter
Sorting by column now works
Performance improvements
Lots of code replaced by Cocoa bindings thanks to Bill Bumgarner

27/02/2004 - Version 1.2

Filter search field now tries to match all fields when filtering
Added auto-refresh timer option
lsof binary and kill signal type can now be set in Preferences
New application icon
Added Icelandic and Japanese localizations

22/02/2004 - Version 1.1

Added search filter.
New Action menu with menu items and shortcuts for button actions

21/02/2004 - Version 1.0

BSD License

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

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

megeek/Sloth