WinMerge is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best open source Mac alternative is KDiff3. If that doesn't suit you, our users have ranked more than 50 alternatives to WinMerge and eight of them are open source and available for Mac so hopefully you can find a suitable replacement. Other interesting open source Mac alternatives to WinMerge are Meld for OSX, Difftastic, ForskScope and xxdiff.
solid cross platform utility
does not diff files (checksum)
Most users think KDiff3 is a great WinMerge alternative.
Meld is a visual diff and merge tool targeted at developers. Meld helps you compare files, directories, and version controlled projects. It provides two- and three-way comparison of both files and directories, and has support for many...
Difftastic is a diff tool that compares files based on their syntax. It supports over 20 programming languages and when it works, it's fantastic.
GUI tool with cross-platform support named after "forske forskjell" (research difference) 🤍
xxdiff is a QT based graphical file and directories comparator and merge tool. It provides comparing two files, three files.
GumTree is a complete framework to deal with source code as trees and computing differences between them.
diffoscope tries to get to the bottom of what makes files or directories different. It will recursively unpack archives of many kinds and transform various binary formats into more human-readable form to compare them.
diffoscope is the most popular Self-Hosted alternative to WinMerge.
tkdiff is a graphical diff viewer based on the Tk framework. It is capable of inter-operating with source-control systems like CVS and Subversion to show differences between a local copy and a repository version.
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Lightweight, good 3 ways merge with 4 sub-windows. Really really visualization. I love it, it works from Linux, Windows to Mac.