Always prompt for Boot Device on Startup?

I have a MacBook where I have to dual boot Windows and OS X. When I hold the Option Key on startup, I get the nice "Select Boot Device" screen.

Is there a way to permanently enable this, so that I don't have to remember to hold option every time I restart?

Solution 1:

One way to do this is to install a boot loader such as rEFIt.

This will present you with a menu similar to the following when you start up your computer:

Solution 2:

On Intel-based Macs, this supposedly works (unverified):

sudo nvram manufacturing-enter-picker=true

Note that this reportedly is not supported on ARM-based Macs.