How to make a game full screen on the external monitor

macos

I have a MacBook Pro 15", that I have connected another screen to.

It;s running perfect with all programs, except when I want to game, because every time I try to open a game (eg HoN/WoW) it opens on my MacBook's built in monitor.

So I switch the game to windowed-mode and drag it over to my other screen, but when I then try to make it full screen, it returns to the built in monitor again.

What can I do to make games play in full screen on my external monitor?

Best Answer

Using google i came upon this page: Full screen app mode doesn't play wel with external displays.

Now this is only with fullscreen apps but I think it might be the same problem. Reading a bit futher in the comments i found this :

Just go into System Preferences > Displays > Arrangement and move the white menu bar strip to the external monitor’s rectangle. Full screen apps seem to associated only with whatever is considered the primary display.

Ps: Don't have osx so I wouldn't know if this works...

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