# One (of the two) windows in fullscreen mode is not fullscreen (Mac Os)
**URL:** https://discourse.glfw.org/t/one-of-the-two-windows-in-fullscreen-mode-is-not-fullscreen-mac-os/201
**Category:** support
**Created:** [February 7, 2016, 6:40pm UTC](https://discourse.glfw.org/t/one-of-the-two-windows-in-fullscreen-mode-is-not-fullscreen-mac-os/201 "2016-02-07T18:40:50Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@system](https://discourse.glfw.org/u/system)
#### Post date: [February 7, 2016, 6:40pm UTC](https://discourse.glfw.org/t/one-of-the-two-windows-in-fullscreen-mode-is-not-fullscreen-mac-os/201/1 "2016-02-07T18:40:50Z")
**[marinosk](https://sourceforge.net/u/marinosk/)** wrote on [Sunday, February 07, 2016](https://sourceforge.net/p/glfw/discussion/247562/thread/3aab102e/#3bf3):
Hello,
In my app (C++14, MacOsX 10.11) I use glfw3 to create two windows that should run in fullscreen mode in two monitors with different native resolutions. I’m creating the windows like this:
```auto
glfwCreateWindow(capture_monitor_width, capture_monitor_height, "Capture Window",capture_monitor,NULL);
//..
glfwCreateWindow(projection_monitor_width, projection_monitor_height, "Projection Window",projection_monitor,NULL);
```
(where `projection_motinor_width`, `projection_monitor_height`,`capture_motinor_width`,`capture_monitor_height` have been retrieved by the appropriate GLFWvidmode\* and they have been tested to be correct in all cases)
The problem is that while I’m getting the fullscreen window correctly in my primary monitor, in my secondary one it is displaced upwards so that it only covers the upper 3/4 (more or less) of the screen. Note that by simply replacing `projection_monitor` with `NULL` in the snippet above I get a properly aligned window that does cover the entire screen (yet it has a title bar which I don’t need in my app).
Any ideas? Could this be some sort of bug? Any hacks around it?
(this is a duplicate of my question in stack\_overflow here: [http://stackoverflow.com/questions/35256960/c-glfw3-one-of-the-two-windows-in-fullscreen-mode-is-not-really-fullscreen](http://stackoverflow.com/questions/35256960/c-glfw3-one-of-the-two-windows-in-fullscreen-mode-is-not-really-fullscreen))
---
### Author:  [@system](https://discourse.glfw.org/u/system)
#### Post date: [February 9, 2016, 4:26am UTC](https://discourse.glfw.org/t/one-of-the-two-windows-in-fullscreen-mode-is-not-fullscreen-mac-os/201/2 "2016-02-09T04:26:15Z")
**[marinosk](https://sourceforge.net/u/marinosk/)** wrote on [Tuesday, February 09, 2016](https://sourceforge.net/p/glfw/discussion/247562/thread/3aab102e/#6c4f):
Just to report that with the devel version the problem disappears, so it’s apparently a bug that’s already fixed.
---
### Author:  [@elmindreda](https://discourse.glfw.org/u/elmindreda)
#### Post date: [February 9, 2016, 6:01pm UTC](https://discourse.glfw.org/t/one-of-the-two-windows-in-fullscreen-mode-is-not-fullscreen-mac-os/201/3 "2016-02-09T18:01:02Z")
Yes, this was issue [653](https://github.com/glfw/glfw/issues/653).