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How do I run two full screen applications on separate screens?

I have two screens for my MacBook Pro with Lion; the laptop screen and a stock screen hooked up by a VGA cable. Currently, when I use a full screen application, my second screen just changes to the grey fabric pattern. How do I run a full-screen application on each screen?

Posted on Jul 30, 2011 2:24 PM

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15 replies

Jul 30, 2011 2:39 PM in response to jared.micah

Hi Jared,


Connect/turn on the external monitor. Open System Preferences on your MBP > Displays. There should be two windows, one for the external monitor and one for the MBP. Click on the window for the external monitor. Click on the Arrangement tab. Uncheck the box for Mirror Displays. This willallow you to set each display to its own resolution. On the external display, click on the pref window for the external monitor display setting. Click on Display. Set the resolution to what you want. On the MBP's display, click on the pref window for the MBP's display and set the resolution to whatever you want. You'll be in what's called "extended desktop mode." You'll have to move the "pointer" all the way to the edge of one display to get it to go onto the other display. Open whatever you want, and drag it to the extended monitor. Set it to full screen. Open another whatever on the MBP's display and set it to full screen. You should be full screen on both displays.

Jul 30, 2011 2:46 PM in response to tjk

My screens are already set up to be extended display. When I drag a window to the second screen and click the full screen button, it moves it over to the main screen and goes full screen there. The second display then changes to the fabric pattern. When I put the window out of full screen mode, it moves it back to the second screen again.

Jul 30, 2011 2:48 PM in response to jared.micah

jared.micah wrote:


My screens are already set up to be extended display. When I drag a window to the second screen and click the full screen button, it moves it over to the main screen and goes full screen there. The second display then changes to the fabric pattern. When I put the window out of full screen mode, it moves it back to the second screen again.


Hmmm, what application are you using?

Aug 2, 2011 1:09 PM in response to jared.micah

Same issue here... I have a 24" CInema Display connected to my 24" iMac. Full-screen mode in Safari or iTunes turns my 24" Cinema Display into a frame for a grey piece of felt 😠



Full-screen mode works just fine in Google Chrome... the browser goes full-screen and any windows on my Cinema Display remain displayed and accessible, but I think it did that before I upgraded to Lion.

Apr 12, 2012 6:23 PM in response to Peter Knox

Hi guys did you ever get a resolve for this as I have exactly the same problem. I gave up and just drag to application over and then manually drag it to fill the screen. I know it's not the same as full screen but it's close. It'd be grand to get full screen though. Its the same on all apps but most annoying went watching a video.


I thinks it's Lion problem but then I've never used anything else.

Apr 19, 2012 2:28 AM in response to Grant Bennet-Alder

Grant Bennet-Alder wrote:


"Full Screen" mode is an abomination carried over from IOS, the land of tiny screens. It is of no use whatsoever once you have a reasonably large screen or multiple screens. Do not use it.



Well said! Apple have taken a perfectly working implementation of full screen in Snow Leopard and completely broken it. It's like my complete faith in Apple's infalibility has been brought into question...

How do I run two full screen applications on separate screens?

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