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I’ve connected my Mac air to two external monitors. My mouse can move between the Screens but I can’t drag apps between the two.Mirroring is unchecked in the display setting and the “different spaces” is also unchecked in mission control. Any idea what is going on here?
[Re-Titled by Moderator]
MacBook, macOS 10.15
The laptop screen and my first monitor are working as expected. However, the second monitor is acting up. It’s being recognized by the OS (I.e showing up in the display section settings and letting my mouse travel on screen) but somehow it is just showing a mirror of the first monitor where no windows are selectable. Does this make sense?
The laptop screen and my first monitor are working as expected. However, the second monitor is acting up. It’s being recognized by the OS (I.e showing up in the display section settings and letting my mouse travel on screen) but somehow it is just showing a mirror of the first monitor where no windows are selectable. Does this make sense?
This sounds like what is happening. Is there any way to solve this problem? The models are Planar pxl2270MW.
Yes. You have mirrored that display to a different one.
Either uncheck the [√] Mirror displays checkbox, or Drag one of the overlapping displays away from the other in the Arrangement pane. The Blue rectangles represent the area of the displays, and their desired relation is space. Leave them connected along any edge:
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I have mirrored unchecked, and am using extended desktop (displays have separate spaces is unchecked in mission control). When I click on the middle blue square below, it highlights both of the monitors, since it thinks monitor two is a mirror of 3, and when I click on the left blue square it highlights the left edge of my monitors (it must think the second monitor is off to the left).
What is supposed to happen when displays are mirrored is that their blue squares overlap about 90 percent, so as to mostly, but not quite completely, coincide. This allow just enough space to select one and Drag it apart to un-mirror them.
There have been reports when using two of the same model display that the Mac can get confused between them.
Are you using two of the same model display? what make&Model?
Have you done a restart lately?
The way the Mac figures out what you connected is the Mac sends a query to the display(s), and they each respond with their name, serial number, and capabilities. That is why the Displays preferences for a particular display knows the name of your display, and shows it in the title of the preferences for that display, but you never had to type it in.
There was a case where a display was sending its model number (and nothing more) as its serial number, and the Mac tended to get confused and treat the two displays as one, in some ways, as two in other ways. It was really weird, and that is why I remember it.
¿What make & Model displays?
Those displays appears to support both DisplayPort and HDMI inputs. One way to try to make them look different from each other might be to use a different interface, but no guarantees that would solve the problem.
You could send Planar an email and ask them about serial-number/model-number confusion. The information in the query/response is referred to as Extended Display Identification Data (EDID) information.
Once you turn off "Displays have separate Spaces" you are using Extended desktop now. You can't drag Apps to a different display.
Try dragging a window, by dragging its Title bar.
Yes the monitors are the same make and model, and I have done a restart lately. Although I haven’t downloaded the new OS update yet.
I can’t drag apps between two monitors
