The dock is not hidden.
It appears at the bottom of the screen on my macbook air.
When I move the pointer to the bottom of the external display, nothing happens.
When I set the dock to be positioned on the RIGHT or LEFT vs BOTTOM it moves in the appropriate direction on both displays.
MacBook Air, OS X Mavericks (10.9.4), howard's MBA
Hi psil0,
Welcome to the Apple Support Communities!
In this situation I would recommend reading over the attached information and make sure the Dock is working as expected.
OS X: Using multiple displays in Mavericks
http://support.apple.com/kb/HT5891
Working with the Dock
When the Dock is configured to appear at the bottom of your screen, it's available on whichever screen you’re working on. Just move your pointer to the bottom of either display. When the Dock is configured for the left or right position, it appears on the leftmost or rightmost display edge.
Tip: If you don't see your dock because it's set to hidden or there's a full screen app on the display, move your pointer to the location of the Dock. If the Dock still doesn't appear, swipe your pointer towards the Dock again to unhide it.
Have a great day,
Joe
The dock will not appear on my external display.
