VoodooI2C is a project consisting of macOS kernel extensions that add support for I2C bus devices. The project is split into two main components: the core extension and various other satellite extensions.

The Core

The core is the VoodooI2C.kext kernel extension. This kext is intended to be installed by anyone whose computer requires some form of I2C support. It consists of I2C controller drivers and is responsible for publishing device nubs to the IOService plane.

The Satellites

The satellites are a collection of various kernel extensions that implement support for a specific type of I2C device. An example of a satellite kext is VoodooI2CHID.kext which adds support for I2C-HID devices. Usually a user will install one satellite kext per class of I2C device.


Current Status

The following Intel I2C controllers are fully supported:

  1. INT33C2 and INT33C3 – Haswell era
  2. INT3432 and INT3433 – Broadwell era
  3. pci8086,9d60pci8086,9d61pci8086,9d62 and pci8086,9d63 – Skylake era
  4. pci8086,a160 and pci8086,a161 – Kaby Lake era
  5. pci8086,9de8 and pci8086,9de9 – Cannon Lake/Whiskey Lake era
  6. pci8086,a368pci8086,a369pci8086,a36a and pci8086,a36b – Coffee Lake era
  7. pci8086,2e8 and pci8086,2e9 – Comet Lake era

The following device classes are fully supported:

  1. I2C-HID devices
  2. ELAN devices
  3. FTE devices

Note that there is sometimes an overlap between device classes. For example, some ELAN devices may also be I2C-HID devices.


Please check the compatibility page on the VoodooI2C wiki to find out if your device is compatible. If it is not on the list but you still suspect VoodooI2C may work for you, contact us on our Gitter page.
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We are looking for competent C++, OS X kernel, Linux kernel, I2C, HID etc developers to help improve this project! Here are the guidelines for contributing:

  • Fork this repository and clone to your local machine
  • Create a new feature branch and add commits
  • Push your feature branch to your fork
  • Submit a pull request upstream


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