I would like to monitor the messages generated when I boot my Mac, similar to what you on a *nix box. Is there key-combo to press/hold that will let me do this?
2 Answers
You have to press cmd + v upon startup to see the boot output. Press this right after the chime.
If you want to make that permanent, you should probably do something along the lines of:
sudo nvram boot-args="-v"
To undo the above:
sudo nvram boot-args=
in the Terminal. (/Applications/Utilities/Terminal.app)
note: I haven’t tested the above commands, but I’m sure a google query will help you there if you want to make it permanent.
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As a Linux user, I am used to reading log messages during startup. They are far more interesting than a boring progress bar. Now that I've bought my first iMac, I'm pleased to have startup log messages on it too. Apr 8, 2023 at 17:11
If you want to see the boot messages after the boot occurred, log in and run sudo dmesg
in Terminal.app.