Compiling a .Kext for later versions of macOS

[Enigmahack]

Have you added MacKernelSDK to the project directory?

This is part of the package above.

I thought I did but clearly if certain files like Availability.h are part of the package, I didn't. I'll go back and check again to see if that helps resolve the compilation issues.

Thanks for the suggestion!


**EDIT**
This worked perfectly. Thanks for your help!