# msr.kext

**Repository Path**: mirrors_relan/msr.kext

## Basic Information

- **Project Name**: msr.kext
- **Description**: OS X kernel extension for reading MSRs (Model Specific Registers)
- **Primary Language**: Unknown
- **License**: GPL-3.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-25
- **Last Updated**: 2026-03-08

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

msr.kext
========
OS X kernel extension for reading MSRs (Model Specific Registers). This is a
companion project to [µProcessor](https://github.com/relan/uproc).

Building
--------
[Xcode](https://developer.apple.com/xcode/) is required. Use the following
command to build the kernel extension (kext):

    xcodebuild -project msr.xcodeproj

Usage
-----
Note that since OS X 10.10 each kext must have a valid digital signature.
Obviously kernel extensions you build do not have one. If you are on
OS X 10.10 use this workaround:

    sudo nvram boot-args=kext-dev-mode=1

On OS X 10.11 and macOS 10.12 you need to enter Recovery by holding `Cmd`+`R`
while OS X boots and run this command:

    csrutil enable --without kext

After reboot you will be able to load the kext:

    sudo chown -R root:wheel build/Release/msr.kext
    sudo kextutil build/Release/msr.kext
    sudo chown -R `id -un`:`id -gn` build/Release/msr.kext

The owner needs to be changed because `kextutil` requires it to be `root:wheel`.
After kext is loaded the owner can be changed back to current user.