Tuesday, February 12, 2008

Verbose Mac Startup

URL: http://www.oreillynet.com/pub/h/348

Verbose booting shows you the actual process of Mac OS X's startup. You'll see drivers get loaded and services launch. You can get it by holding Command - V at boot time, which brings up the familiar white on black console.

If you'd prefer to always see the system messages on boot, you can adjust the firmware from the Terminal with the nvram command.

To turn on Verbose booting, at the Terminal type the following:

sudo nvram boot-args="-v"

Disabling Verbose mode:

sudo nvram boot-args=

And to see the current firmware nvram settings:

nvram -p

More info on the boot process here: http://www.kernelthread.com/mac/osx/arch_boot.html
and here: http://developer.apple.com/documentation/MacOSX/Conceptual/BPSystemStartup/Articles/BootProcess.html

More hints here: http://nosheep.net/story/mac-os-x-start-up-keys/ and here: http://docs.info.apple.com/article.html?artnum=106482

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