How to Take Screenshots of the Login Screen on any Mac

Taking screen shots of the login screen on a Mac is possible, and you can do so at either the OS X system boot, any login window, or at a locked user authentication screen. How a screenshot of the Mac login screen is accomplished will depend on what version of OS X the Mac is running however.












Gatekeeper is a security feature built into Mac OS X which helps to prevent unauthorized applications and code from executing on a Mac. Most users have encountered Gatekeeper before when they go to open an application downloaded from the internet, where you see an 


