Lilu

github.com/acidanthera/Lilu Mac Apps Open-source projectOpen source

Lilu provides a macOS kernel extension for patching other extensions, libraries, and processes.

github.com/acidanthera/Lilu
Lilu homepage screenshot

About Lilu

Lilu is an open source kernel extension for macOS that provides a platform for patching kexts, libraries, and programs. It includes generic patchers for kexts, processes, and frameworks/libraries, plus a unified plugin API, and is installed alongside plugin kexts that depend on it.

Most plugins cease to function in safe (-x) mode, and Lilu itself does not function in single-user (-s) mode unless -liluforce is present.

Key features

  • Generic kext patcher for macOS
  • Generic 64-bit process patcher with basic 32-bit support
  • Generic 64-bit framework/library patcher with basic 32-bit support
  • Unified plugin API for building patching plugins
  • Boot arguments for debugging, disabling, and forcing load
Best for: Developers building macOS kext, library, or process patching plugins and users installing kexts that require Lilu.
Good for
  • Covers kext, library, and program patching in one platform
  • Provides a unified plugin API for plugins
  • Open source under BSD-3-Clause license with prebuilt binaries on releases page
Watch out for
  • Most plugins cease to function in safe (-x) mode
  • Does not function in single-user (-s) mode by default without -liluforce
  • Process and framework/library patching has only basic 32-bit functionality

Lilu at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Platforms
macOS
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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Lilu FAQ

How is Lilu installed?
Install Lilu.kext along with the plugin kexts depending on it. Prebuilt binaries are available on the releases page.
Does Lilu work in safe or single-user mode?
Most plugins cease to function in safe (-x) mode. By default Lilu itself does not function in single-user (-s) mode unless -liluforce is present.
How do I disable or debug Lilu?
Use boot arguments such as -liluoff to disable Lilu, -liluuseroff to disable the user patcher, and -liludbg or -liludbgall in DEBUG binaries to enable debug printing.
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