Monolingual
Monolingual is a system utility for macOS that removes unused language localisations and CPU architectures from installed applications and system files in order to free up disk space. It scans your Applications folder and system libraries, identifies redundant language packs and processor-specific code that your Mac does not need, and permanently removes them to recover storage. The app is primarily used by storage-conscious users on Macs with limited drive capacity, developers testing universal binary stripping, and power users who want to minimise installation footprints. It operates at a low system level and requires administrator privileges.
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1 suggestionMonolingual has been discontinued by its developer and no longer receives updates or support. The last release (version 1.8.2) was published several years ago, and the GitHub repository shows no meaningful activity since then. Although Monolingual was reported to run under Rosetta 2 on early M-series Macs, it is an Intel-only build with no native Apple Silicon version, and it will stop launching entirely when Apple removes Rosetta 2 in macOS 28 (September 2028). More importantly, modern macOS (especially versions 11 Big Sur and later) has made the low-level disk-stripping operations Monolingual performs extremely difficult due to System Integrity Protection and code-signing enforcement — the app is increasingly unreliable even today. If you still have disk-space constraints, consider built-in macOS storage-management tools (System Settings → General → Storage, or the Storage Management utility) and modern disk-analysers like CleanMyMac X or DiskSight, which are actively maintained and run natively on Apple Silicon. Do not rely on Monolingual for any critical operations before migrating to a modern alternative.
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