Mac OS verbose mode

I think everyone know about and this info is easy find in the Internet, but it is for fast recall. This command works only with Intel based Macs (EFI). I'm not responsible for any damage by this trick.

Wanna watch EFI settings in XML form use:

$ nvram -xp

Setup boot in verbose mode by command in terminal:

$ sudo nvram boot-args="-v"

Back to standard boot:

$ sudo nvram boot-args=""

This tip by way of @ctrld