# Exported Processing applications won't run fullScreen() on 2nd display. Mac

**URL:** <https://discourse.processing.org/t/exported-processing-applications-wont-run-fullscreen-on-2nd-display-mac/14155>\
**Category:** Beginners\
**Created:** [September 24, 2019, 12:49am UTC](https://discourse.processing.org/t/exported-processing-applications-wont-run-fullscreen-on-2nd-display-mac/14155 "2019-09-24T00:49:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nicnut](https://avatars.discourse-cdn.com/v4/letter/n/7feea3/32.png) [@nicnut](https://discourse.processing.org/u/nicnut)\
**Post date:** [September 24, 2019, 12:49am UTC](https://discourse.processing.org/t/exported-processing-applications-wont-run-fullscreen-on-2nd-display-mac/14155/1 "2019-09-24T00:49:49Z")

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Hi,

I am using a Mac powerbook running OS 10.13.6 and Processing 3. I am trying to get my Processing sketches, plus exported applications, running on a external monitor, and eventually a projector connected to my computer.

I have tried dragging the Processing sketches that I exported as apps to the 2nd monitor and opening them there, and opening Processing sketches on the 2nd display, but they always open on my primary monitor.

If I run the sketch, or application, not as full screen it will open and run on the 2nd display. If I do it as full screen it will only run on the primary display. I have tried messing with the Processing preferences, where you can choose display 1 or 2 and that doesn’t change anything. I also tried messing around with the mac system display preferences.

I also looked at this post, which doesn’t really help much:

> [@P2D & P3D (OpenGL) not working on secondary displays](https://discourse.processing.org/t/p2d-p3d-opengl-not-working-on-secondary-displays/2906):
>
> I have a new desktop Windows 10 computer that has NVS 810 and NVS 310 graphics cards added to expand the amount of screens which can be attached. I have an older version of this project working fine with the exact same graphics cards and is also Windows 10. My problem is that I cannot run P3D (or P2D) on any of the screens attached to the graphics cards but it will run on the integrated graphics. My application calls for fullScreen so it’s pretty straightforward but if I use size instead and …

Any suggestions? Ideally I want my processing sketches to run full screen on a 2nd display.

thank you.

Nick

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<div class="post-metadata">

**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [September 26, 2019, 3:58am UTC](https://discourse.processing.org/t/exported-processing-applications-wont-run-fullscreen-on-2nd-display-mac/14155/2 "2019-09-26T03:58:29Z")

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Did you try `fullScreen(2)` as per the reference page?

[https://processing.org/reference/fullScreen\_.html](https://processing.org/reference/fullScreen_.html)

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<div class="post-metadata">

**Author:** ![nicnut](https://avatars.discourse-cdn.com/v4/letter/n/7feea3/32.png) [@nicnut](https://discourse.processing.org/u/nicnut)\
**Post date:** [September 26, 2019, 6:41pm UTC](https://discourse.processing.org/t/exported-processing-applications-wont-run-fullscreen-on-2nd-display-mac/14155/3 "2019-09-26T18:41:28Z")

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@jeremydouglass oh man I feel so dumb for not looking at the reference page. I was searching the forum and google and didn’t think it could have anything to do with fullScreen().

Anyway, yes this works! you just saved my day.

Thank You. Nick