FFmpeg and LAME on macOS / Mac OS X. 64-bit libraries for Audacity 2.3.1 and later. Audacity 2.3.1 on Mac is now a 64-bit application and thus requires 64-bit libraries for LAME and Ffmpeg. Audacity provides you with a full set of tools that you can use to edit audio files and add effects through a clear and accessible interface. Users of all experience levels will benefit from this. Another idea: An IDE for Nyquist Plug-ins. This could be included in Audacity, or a separate app. If done as a separate app, it could be written in Python / Tk, which would perhaps encourage contributions from users of the IDE, and provide easy integration with mod-script-pipe (pipe commands directly from the IDE to Audacity). See the User's Manual for further details including a list of literature citations for example applications. Download includes User's Manual, HostDesigner 4.0 source code (in Fortran), data files, example input, HDViewer executables for MacOS, Linux, and Windows, and mengine source code (in C). HostDesigner was developed and posted by author Dr. Audacity is a free and open-source digital audio editor and recording application software, available for Windows, macOS/OS X and Unix-like operating systems. Audacity was started in the fall of 1999 by Dominic Mazzoni and Roger Dannenberg at Carnegie Mellon University and was released on May 28, 2000 as version 0.8. The Manual is present if you get the Windows Installer or Mac DMG file, so no internet connection is needed to start learning and experimenting. If you download the ZIP or the source code, you can still download and install the Manual. Otherwise, you will need an Internet Connection for the online version of the Manual.
Audacity for Mac is a powerful audio editing tool that surpasses default OS X tools. The downsides are a dated and sometimes clunky interface and a cumbersome installation process.
Pros
Powerful and robust feature set: Audacity is loaded with audio editing, recording, and exporting tools that work in tandem with Mac's multimedia capabilities.
Free with regular updates for diverse uses: Audacity is a free, regularly updated tool with solid support from the developer. This means a solid core that works far better than some other free software suites in the same category, and a good alternative to somewhat limited tools like GarageBand.
Cons
Audacity Mac Manual Free
Interface is dated and sometimes clunky: While Audacity's feature set delivers, it looks and feels a little dated compared to more modern software. In most cases this is purely aesthetic, but finding certain menus can be cumbersome in some circumstances.
Bottom Line
If you need a powerful, free audio editing tool for your Mac, Audacity is a great tool with which to start. While the interface could use some updates, you'll still get the bang you're looking for in your audio project.