# Problem using multiple monitors

**URL:** <https://mworks.discourse.group/t/problem-using-multiple-monitors/434>\
**Category:** Support\
**Created:** [July 27, 2016, 1:57pm UTC](https://mworks.discourse.group/t/problem-using-multiple-monitors/434 "2016-07-27T13:57:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 27, 2016, 1:57pm UTC](https://mworks.discourse.group/t/problem-using-multiple-monitors/434/1 "2016-07-27T13:57:21Z")

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The “setup\_variables” file should be the one defining the external parameters (monitor size, number of monitors), and there’s even an example file for two monitors.  
Yet, I’m not able to get this to work (either by attaching an external monitor to my MacBook - MWork crashes, or by attaching two monitors to Mac mini).  
If I attach two monitors to Mac mini I will get the stimuli presented on one of them (full screen), but I can’s get the mirror screen on the other one.  
Any suggestion is welcome.

Vladimir

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**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 27, 2016, 2:24pm UTC](https://mworks.discourse.group/t/problem-using-multiple-monitors/434/2 "2016-07-27T14:24:22Z")

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Hi Vladimir,

Can you send me the `setup_variables.xml` file that you’re trying to use?

Thanks,  
Chris

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**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 29, 2016, 1:41pm UTC](https://mworks.discourse.group/t/problem-using-multiple-monitors/434/3 "2016-07-29T13:41:35Z")

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Hi Vladimir,

I don’t see any issues with the setup file you sent me. One thought is that maybe the mirror window is ending up behind the full-screen stimulus window. After loading an experiment, if you enter [Mission Control](https://support.apple.com/en-us/HT204100), do you see the mirror window? (The full-screen window should disappear when Mission Control activates.)

As for the crash on your MacBook Pro, it’s very possible that there are issues with running MWorks 0.4.4 on OS X 10.9. MWorks 0.4.4 (which was released 6 years ago now) was only ever tested on OS X 10.6. Can you try installing MWorks 0.6 and see if that fixes things?

Chris

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<div class="post-metadata">

**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Post date:** [July 19, 2022, 10:01pm UTC](https://mworks.discourse.group/t/problem-using-multiple-monitors/434/4 "2022-07-19T22:01:13Z")

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