Here are which I've found:

• FileMerge (opendiff)

  It's bundled with Xcode with Command Line Tools installed

• DiffMerge It's bundled with Xcode with Command Line Tools installed

• vimdiff

  It's free and open source. Install by: brew install vim.

• Meld

  Can be installed using Homebrew via command: brew install meld, but probably it won't work.

• KDiff3

  Can be installed using Homebrew via command: brew install kdiff3

• TkDiff

  Can be installed using Homebrew via command: brew install tkdiff

• TextWrangler

• VisualDiffer

  Available at App Store

• Kaleidoscope

  Commercial with free trial.

• Araxis Merge

  Commercial with free trial.

• Changes

  Commercial with free trial.

Check also Comparison of file comparison tools at Wikipedia for the full list.

Here are which I've found:

• FileMerge (opendiff)

  It's bundled with Xcode with Command Line Tools installed

• DiffMerge It's bundled with Xcode with Command Line Tools installed

• vimdiff

  It's free and open source. Install by: brew install vim.

• Meld

  Can be installed using Homebrew via command: brew install meld, but probably it won't work.

• KDiff3

  Can be installed using Homebrew via command: brew install kdiff3

• TkDiff

  Can be installed using Homebrew via command: brew install tkdiff

• TextWrangler

• VisualDiffer

  Available at App Store

• Kaleidoscope

  Commercial with free trial.

• Araxis Merge

  Commercial with free trial.

• Changes

  Commercial with free trial.

Check also Comparison of file comparison tools at Wikipedia for the full list.

Here are which I've found:

• FileMerge (opendiff)

  It's bundled with Xcode with Command Line Tools installed

• DiffMerge It's bundled with Xcode with Command Line Tools installed

• Meld

  Can be installed using Homebrew via command: brew install meld

• KDiff3

  Can be installed using Homebrew via command: brew install kdiff3

• TkDiff

  Can be installed using Homebrew via command: brew install tkdiff

• TextWrangler

• VisualDiffer

  Available at App Store

• Kaleidoscope

  Commercial with free trial.

• Araxis Merge

  Commercial with free trial.

• Changes

  Commercial with free trial.

Check also Comparison of file comparison tools at Wikipedia for the full list.

Here are which I've found:

• FileMerge (opendiff)

  It's bundled with Xcode with Command Line Tools installed

• DiffMerge It's bundled with Xcode with Command Line Tools installed

• vimdiff

  It's free and open source. Install by: brew install vim.

• Meld

  Can be installed using Homebrew via command: brew install meld, but probably it won't work.

• KDiff3

  Can be installed using Homebrew via command: brew install kdiff3

• TkDiff

  Can be installed using Homebrew via command: brew install tkdiff

• TextWrangler

• VisualDiffer

  Available at App Store

• Kaleidoscope

  Commercial with free trial.

• Araxis Merge

  Commercial with free trial.

• Changes

  Commercial with free trial.

Check also Comparison of file comparison tools at Wikipedia for the full list.