KEXT for Mavericks without code signing

This is a very basic Kernel Extension (KEXT) that does nothing except printf() a couple log entries to the Console.

Although it may seem otherwise, you don't need to code sign your KEXT in order to get it to run on Mavericks. You simply need to do the following:

1. Turn off code signing in your project. Go to Settings and under the Code Signing section, set Code Signing Identity to Don't Code Sign.

2. Build.

3. The .kext has to be in the /System/Library/Extensions/ folder for this to work. Do

   sudo cp -R path/to/helowrld_kext.kext /System/Library/Extensions/

4. Then, load:

   sudo kextload /System/Library/Extensions/helowrld_kext.kext

5. You should see the message "helowrld" from kernel if you check Console.

6. To end it:

   sudo kextunload /System/Library/Extensions/helowrld_kext.kext

7. You should see "helowrld:stop" in Console

That's it. You can take it from here.