Why does virtual box vboxheadless process using Vagrant use 100% of my cpu?

Question

So I\'m using a couple vagrant boxes and when i have them up, \"sometimes/randomly\" it starts to take up 100% cpu on my OS X machine and i have no idea whats causing it. I

Answer 1

I have disabled System Integrity Protection in order to be able to use iosnoop to diagnose high ioctl activity, which seems to cause 100% CPU usage.

The problem disappeared. So I believe it has something to do with SIP.