If my second display is not showing up on the graphics display window, yet the second display is showing a mirror image, how can I get it to recognize the second display and allow me to setup extended desktop?

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If my second display is not showing up on the graphics display window, yet the second display is showing a mirror image, how can I get it to recognize the second display and allow me to setup extended desktop?

I'm running 10.9.2 on a Power Mac from 2013. I am using two identical HP monitors. I have a Y adapter to connect the monitors. Which I'm guessing means the computer is only seeing one display since there is only one display output.

Mac Pro, OS X Mavericks (10.9.2), graphics card is ATI Radeon HD,

Posted on Mar 27, 2014 9:50 AM

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Answer 1

a brody

Level 10

82,841 points

Mar 27, 2014 5:40 PM in response to jmacatak

There are no PowerMacs from 2013. The desktop tower from 2006 on got named Mac Pro. The problem is probably the Y adapter. You need a videocard with two display ports, or two videocards to be able to make an extended desktop from one to the other. If you gave us the Y adapter make and model, we could tell if it supports screen spanning or not.

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