Cog (software)

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Cog icon
Cog screenshot
Cog 0.07 (r909)
Developer(s) Vincent Spader
Initial release 0.01 (2005-06-02)
Stable release 0.07 (December 24, 2007; 9 years ago (2007-12-24)) [±]
Preview release 0.08 (r2051) (February 7, 2013; 4 years ago (2013-02-07)) [±]
Written in Objective-C \ Cocoa
Operating system macOS 10.4+ (Tiger and above)
Available in Multiple Languages
Type Audio player
License GPL

Cog is an open source audio player for macOS.[1] The basic layout is a single-paned playlist interface with two retractable drawers, one for navigating the user's music folders and another for viewing audio file properties, like bitrate. Along with supporting most audio formats compatible with macOS's Core Audio API, Cog supports a wide array of other audio formats, along with their metadata, which are otherwise unsupported on macOS.[2]

In April 2006, Cog joined other Mac OS X audio software Tag and Max in an effort by the respective authors to consolidate Mac OS X open source audio software on the internet. Subsequently, the Cog website was redesigned to Tag and Max's website design, and its forums were also moved to the Tag and Max Forums.[3] In July 2007, Cog moved to its own separate forums shortly before the release of version 0.06.



  • support
  • Growl support
  • Global hotkeys
  • File drawer
  • Info drawer
  • Smart shuffle
  • Seeking
  • Feedback form
  • Automatic Updates (choice of Stable, Nightly, or Unstable)

Audio formats[edit]

Playlist formats[edit]

Metadata formats[edit]


Known Issues for Mac OS X v10.5 Leopard[edit]

  • Playlist issues including "invisible playlist"
  • Unattended cross-fade at random times

See also[edit]


  1. ^ Cog - News. Retrieved on 2013-12-09.
  2. ^ Cog - Features. Retrieved on 2013-12-09.
  3. ^ • View topic - Relationship between Play and Cog?. (2007-02-12). Retrieved on 2013-12-09.

External links[edit]