P4Merge displays files side-by-side, with the center as a base file. The purple icon and its color scheme highlight the input file, while the green icon and its color scheme highlight the output file. P4V integrates with the P4 diff and merge tool. When done, submit the modified file back to the shared repository or depot, where it keeps track of all the file revisions. You open the files and edit them in your workspace. P4V is the client for the Helix core server that hosts all your data and resides in a depot. Helix P4V is a cross-platform, enterprise version control software to compare and merge source files, web pages, manuals, OS code, and more.

With text filters ( Preferences > Text Filters), you can ignore text that matches a particular pattern or even use regular expressions to create complex filters.

The text editor supports line numbers, whitespace, syntax highlighting, and text wrapping for a user-friendly experience.

The built-in version filter helps you compare any changes with the repository file.

Integrates with version control systems, such as Git, Bazaar, Mercurial, and SVN.

The changes update in real-time, no matter how big the file gets.

Three-way comparison of files and folders.

Click the arrows in a segment to copy or merge a block of one file with another. They give you a bird's-eye view of all changes, whether it's inserted, deleted, changed, or in conflict.

On either side of the panels, you'll see two vertical bars with colored blocks. Any differences between them appear highlighted to make individual changes easier to see.

To start a comparison, click the File module and select your files from Finder. On first launch, the app gives you an option to choose a comparison module. It has many customizable settings to make file and folder comparison on Mac quick and easy. The user interface is intuitive and neatly packs all its functions into a handy menu.

It's available for Mac via third-party binaries or package managers like Homebrew.

Meld is a simple, cross-platform diff and merge tool.

Winmerge vs beyond compare