How can I enable firmware password for normal boot?

Question

I've enabled firmware password protection, but it won't work unless you try to boot in other mode ( like holding c, d or option to boot from other drives ). However, what I want is a complete lock from opening my computer. Is there a way to enforce this?
Best Regards

Answer 1

Even if with the firmware password, you're not safe. There are ways to bypass both the firmware password and the login password. To be as safe as possible:
1) Turn on the firmware password, as you have done
2) Turn off auto-login, so that users have to log in to use the machine
3) Set the login window to ask for name and password instead of displaying a list of users
4) Use good encryption with a good password to protect any sensitive data
or,
4b) Don't ever let the machine out of your sight!
Disk Utility can help with #4 through use of encrypted sparse disk images on which you store sensitive data. File Vault can also help by encrypting your entire user folder, but IMHO this is a bad idea unless absolutely necessary, as it complicates backups and means that any little disk corruption could trash your entire user directory (since it'll be stored in one big, encrypted file).