Weird to see this downvoted, because it's totally true. Apple imports FreeBSD's userland periodically but not its kernel/drivers, and thus has nothing to do with how well FreeBSD works on PC hardware: https://wiki.freebsd.org/Myths#FreeBSD_is_Just_macOS_Without...

> Apple imports FreeBSD's userland periodically but not its kernel/drivers ...

OS-X/macOS runs an entirely different kernel called XNU[0][1], which is why userland tools can be imported whereas FreeBSD kernel and device driver code cannot.

0 - https://en.wikipedia.org/wiki/XNU

1 - https://github.com/apple-oss-distributions/xnu