getting your Mac to boot in verbose mode on every boot

Verbose booting can be extremely useful, especially when trying to ascertain the cause of a netbooting failure. However it is generally useful to read through the EFI output as the Mac boots up.

To do this, you can always hold ‘command-v’ as the Mac starts up to force a verbose boot, but the next time the Mac boots it will default to a normal startup sequence. In order to cause the Mac to boot verbosely for the next and subsequent startups, you can issue the ‘nvram boot-args=”-v”.’ Make sure that you do this as the super user.


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