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Yesterday a window appeared saying eficheck dump which I don't understand. I duck ducked it and it suggested that an OS reinstall would fix it. There was something else about having a firmware password which I did. Booting into recovery mode a padlock appeared, something
I wasn't expecting but eventually realized that I had to enter my firmware password to proceed to reinstalling my OS. After that everything was back to normal.

Question, what are the pros and cons of having/not having a firmware password and do I need one?

jaybass