I can't believe I am the first to get burned. While this program may do what it says, and does exactly what all of the other suspiciously-similiar glowing reviews claim, it just switches to the new resolution automatically without confirming if it actually works. Apple makes you confirm a resolution change, so if you choose a setting your monitor doesn't support, you can hit "esc" to revert back to your old setting. This program does not, and if your monitor goes blank due to using an out-of-range setting in OS X, you're pretty hosed with no easy way of resetting to a default resolution. I had to do an entire OS reinstall. Not for the faint of heart!