to TS!
Jim gave excellent directions for a Login password but I suspect our newest member is looking for something like the Firmware Protection Password. The old PPC Macs had Open Firmware but the Intel Macs have EFI, nonetheless Apple included a way to provide the same protection.
QUOTE
Q. Does the shift to EFI mean that Open Firmware is gone on Intel Macs?
Yes. Open Firmware is the name for the firmware found on all PowerPC Macs. It no longer exists on Intel Macs. Holding down the Command-Option-O-F keys at startup, which brings up the Open Firmware command line interface in PowerPC Macs, does nothing on Intel Macs. This means that Open Firmware commands (such as reset-nvram, a fix occasionally recommended on MacFixIt) no longer function.
Q. But I just checked the /Applications/Utilities folder on the Mac OS X Install Disc 1 DVD that came with my Intel Mac. It still includes a utility called Open Firmware Password. What gives with that?
Indeed you are correct. This utility, on PowerPC Macs, provides a simple graphical user interface for setting an Open Firmware password. If enabled, this offers a security protection that prevents users from starting up the Mac via anything other than the internal drive — unless you supply the Open Firmware password. The utility bypasses the need to otherwise enable this option by booting into Open Firmware at startup. Given that Open Firmware no longer exists on Intel Macs, I was surprised to see this utility included on the Install DVD for my new iMac. Even more surprising, the utility had been updated to a Universal application.
But the biggest surprise was: It still works! I tested this out by enabling the password and restarting the Mac while holding down the Option key. This gets the Startup Manager screen to appear (which allows you to select a startup volume from any connected bootable drive or disc). However, before the Startup Manager appeared, a password screen popped up from which I had to enter my "Open Firmware" password before I could proceed.
Is this actually an EFI-based password? Does this mean the Open Firmware Password utility should be renamed EFI Password? I assume so, but have been so far unable to confirm this. Just one of the minor mysteries still to be resolved...and perhaps answered in a future NSFAQ.
Indeed it does work on the Intel Macs.
Here is Apple's article on how to set it up and what it will do:
http://docs.info.apple.com/article.html?artnum=106482
Note that the only way to defeat this would be to remove or alter the original RAM configuration of the MacBook and do the following:
QUOTE
After removing / adding more RAM than before, Turn on the computer and immediately reset PRAM by holding the Command-Option-P-R key combination. Press the keys until you've heard two successive startup sounds.
Open Firmware password protection should be now disabled. Shut down the computer and return it to its original RAM configuration.