If you have a Macbook and you want to use it with another monitor, you’ll find that the menu bar stays on the main screen of your Macbook, and the other displays won’t have menu bars at the top of the display. Frankly, this is a pain in the butt.
I was given one option of trying Multimon, but US$10 seemed like a lot to shell out for this feature.
I have since discovered Secondbar, which works a treat!
Secondbar can be downloaded from here