There is MAC framework inside MacOS X kernel, but it's only for Apple usage. Developers arent' supposed to use it, because Apple states that it has no ABI stabi

There is MAC framework inside MacOS X kernel, but it's only for Apple usage. Developers arent' supposed to use it, because Apple states that it has no ABI stability and it can change unexpectedly from version to version. That is probably why it's not used by any commercial software (or it's so rare). Instead, Apple designed a KAUTH framework, which is way more limited than MAC, but can be used to implement some features that will be stable across kernels (it has ABI stability). There are already some AVs that are using KAUTH.