MacOS-only free software

open source Web browser

NeoOffice is a discontinued office suite for the macOS operating system developed by Planamesa Inc. It was a commercial fork of the free and open source LibreOffice office suite, including a word processor, spreadsheet, presentation program, and graphics program. It added some features not present in the macOS versions of LibreOffice and Apache OpenOffice. The last few versions were based on LibreOffice 4.4, which was released mid-2014.

Adium is a free and open-source instant messaging client for macOS that supports multiple IM networks, including XMPP (Jabber), IRC and more. In the past, it has also supported AIM, ICQ, Windows Live Messenger and Yahoo! Messenger. Adium is written using macOS's Cocoa API, and it is released under the GNU GPL-2.0-or-later and many other licenses for components that are distributed with Adium.

TextEdit is an open-source word processor and text editor, first featured in NeXT's NeXTSTEP and OPENSTEP. It is now distributed with macOS since Apple's acquisition of NeXT, and available as a GNUstep application for other Unix-like operating systems such as Linux. It is powered by Apple Advanced Typography.

Shiira (シイラ, Japanese for the common dolphin-fish) is a discontinued open source web browser for the Mac OS X operating system. According to its lead developer Makoto Kinoshita, the goal of Shiira was "to create a browser that is better and more useful than Safari". Shiira used WebKit for rendering and scripting. The project reached version 2.3 before it was discontinued, and by December 2011 the developer's website had been removed.

TextMate is a free and open-source general-purpose GUI text editor for macOS created by Allan Odgaard. TextMate features declarative customizations, tabs for open documents, recordable macros, folding sections, snippets, shell integration, and an extensible bundle system.

Cyberduck is an open-source client for FTP and SFTP, WebDAV, and cloud storage (OpenStack Swift, Amazon S3, Backblaze B2 and Microsoft Azure), available for macOS and Windows (as of version 4.0) licensed under the GPL. Cyberduck is written in Java and C# using the Cocoa user interface framework on macOS and Windows Forms on Windows. It supports FTP/TLS (FTP secured over SSL/TLS), using AUTH TLS as well as directory synchronization. The user interacts with the user interface (GUI), including file transfer by drag and drop and notifications via Growl. It is also able to open some files in extern

TeXShop is a free LaTeX and TeX editor and previewer for macOS. It is licensed under the GNU GPL.

IRC client

utility software for macOS

iTerm2 is a free and open-source terminal emulator for macOS, licensed under GPL-2.0-or-later. It was derived from and has mostly supplanted the earlier "iTerm" application.

IINA () is a free and open-source media player software based on mpv and written in Swift for macOS. It is released under the GNU General Public License version 3 (GPLv3).

OsiriX is an image processing application for the Apple MacOS operating system dedicated to DICOM images (".dcm" / ".DCM" extension) produced by equipment (MRI, CT, PET, PET-CT, ...). OsiriX is complementary to existing viewers, in particular to nuclear medicine viewers. It can also read many other file formats: TIFF (8,16, 32 bits), JPEG, PDF, AVI, MPEG and QuickTime. It is fully compliant with the DICOM standard for image communication and image file formats. OsiriX is able to receive images transferred by DICOM communication protocol from any PACS or medical imaging modality (STORE SCP – Se

KisMAC is a wireless network discovery tool for Mac OS X. It has a wide range of features, similar to those of Kismet (its Linux/BSD namesake). The program is geared toward network security professionals, and is not as novice-friendly as similar applications. Distributed under the GNU General Public License, KisMAC is free software.

Qemu based CPU emulator

OpenEmu is an open-source multi-system video game emulator designed for macOS. It provides a plugin interface to emulate numerous consoles' hardware, such as the Nintendo Entertainment System, Genesis, Game Boy, and many more. The architecture allows for other developers to add new cores to the base system without the need to account for specific macOS APIs.

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