MacOS – Stop dock moving between monitors while moving mouse to the bottom of screen

Are you using a trackpad by any chance? I too thought the way the Dock popped up on different monitors was completely arbitrary or broken, until I found out how it actually works:

• If you move the cursor to the bottom edge of either screen and keep your finger on the trackpad, the dock will pop up right away
• If you flick the cursor to the bottom edge of either screen (removing your finger from the trackpad as you finish the movement), the dock will not pop up

This is designed like this intentionally so that as you're mousing around in full-screen apps, you don't inadvertently trigger the dock when you use controls at the bottom of the full-screen window.

It actually works really well, once you know how it works ;-)

If you are OK with losing the new features of Maverick's multiple displays, open System Preferences, click Mission Control, the uncheck the box that says, "Displays have separate spaces". Log out, then log back in, the problem should be resolved.