DiffMerge
DiffMerge is a file comparison and merge tool for macOS, used by developers and teams to visualize differences between text files, source code, and directory structures. It provides side-by-side diff views, three-way merge capabilities for resolving conflicts, and integration with version control systems. The app was particularly popular among software engineers working with Git and other SCM tools for reviewing changes and resolving merge conflicts.
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1 suggestionDiffMerge has been discontinued by SourceGear — the vendor no longer ships updates or provides support. The app was never updated to a native Apple Silicon build, and only the legacy Intel version (32-bit / 64-bit Universal Binary) was ever released. The app will stop launching entirely when Apple removes Rosetta 2 in macOS 28 (September 2028), which is just over two years away. You should migrate to an actively maintained alternative now rather than waiting until the deadline. Beyond Compare is the most direct commercial replacement and runs natively on Apple Silicon; it offers similar three-way merge and extensive diff capabilities. If you prefer a free option, Meld is a capable open-source alternative that also ships a native build for M-series Macs. For Git-specific workflows, FileMerge (included free with Xcode) or Kaleidoscope are also solid native alternatives depending on your feature needs.
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