Mac OS X - Boot into verbose mode all the time.

If you want to boot into your Mac in Verbose mode all the time do the following:

Open Terminal
Type: nvram -p
This will show you if any boot-args are set.

To Turn Verbose mode on.
Type: sudo nvram boot-args="-v"
If you had any boot-args in the previous step you would copy those args as well.

To Turn Verbose mode off.
Type: sudo nvram boot-args=

You will now always see what your MAC is doing during boot up. No more mysteries.