Go ask Red Hat for their sources.

EDIT: I’m a Linux Performance Engineer with 15 years under my belt and I use a Mac as my daily driver. Including when I gasp interface with Linux computers because it’s always a combination of ssh and configuration management of some form. Telling me that Mac users don’t use vim is, on its face, one of the dumbest things I’ve ever heard. It’s a text based interface. I could do it with Windows, but I’m faster on Macs.