Screen Sharing control issue with multiple displays arranged diagonally on iMac

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Level 1

8 points

Screen Sharing control issue with multiple displays arranged diagonally on iMac

One of the iMac in a production environment has 2 additional external display. In order to prevent the mouse pointers from appearing on the other 2 external display, they are been arranged diagonally.

However, when arranged in such manner, our crew will not be able to control that iMac using screen sharing. He can only view, but unable to see where is his mouse.

Problem can be solved by arranging all 3 screens side by side, but this is not the ideal configuration for us.

Does anyone know how to resolve this issue or is there any better suggestion?

[Re-Titled by Moderator]

Original Title: When screen sharing, users can only view but unable to control the mouse pointer when multiple screens are not arrange in a row.

iMac (2017 – 2020)

Posted on Nov 7, 2025 12:15 AM

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Answer 1

den.thed

Level 10

90,712 points

Nov 8, 2025 7:45 AM in response to MerlionRock

The previous replies are based on what we know about macOS multiple displays and screen sharing.

You never mention that you were using ProPresenter in your initial post. If the side by side work-around is not ideal, then reach out to ProPresenter Support for a better solution. > https://support.renewedvision.com/hc/en-us#contact-support

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Answer 2

den.thed

Level 10

90,712 points

Nov 7, 2025 7:28 AM in response to MerlionRock

Try vertical orientation with the Main Display on the bottom and the additional displays side by side.

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Answer 3

Camelot

Level 9

58,257 points

Nov 7, 2025 10:34 AM in response to MerlionRock

If you're running as an extended desktop, then there has to be some degree of overlap between the screens, because the OS expects you to want to move your mouse from one screen to another. If there's no overlap then there's no point where the mouse can move to the adjacent screen.

As for screen sharing, what system are you using for sharing? and is this interactive (where the. client controls the main system) or view-only?

When running multiple displays the user usually has control over which display(s) to share remotely.

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Answer 4

MerlionRock Author

Level 1

8 points

Nov 8, 2025 7:54 AM in response to Camelot

Refer to the settings as shown before. As mentioned, the purpose of doing so is to prevent the mouse pointer from appearing on the external displays, or at least make it less likely for it to appear on the external displays.

While the OS is expecting users to move our mouse from one screen to another, in a presentation environment, this is what user don't expect it from happening.

And as mentioned, which you can try with macOS Sequoia 15.7.1, when using the default Screen Sharing app on Mac, the client system (Macbook Pro, M processors) will not be able to control on the main system with external displays arranged as shown in screenshot below.

What happen is the mouse will stuck at the top of the screen on the main system how matter how the mouse is moved on the client machine. Refer to attached images as reference. Note in the attached image, I've already selected which screen to control. If this is not considered as system bug, then's it's the Screen Sharing app that's having issue?

Main System's display settings

Position of the mouse on client's system when using Screen Sharing App

Position of the mouse on main system when it's being controlled remotely.

[Edited by Moderator]

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Answer 5

Camelot

Level 9

58,257 points

Nov 8, 2025 10:42 AM in response to MerlionRock

I agree with den.thed here.

ProPresenter is not the 'default Screen Sharing app' on MacOS, therefore whatever the standard OS does isn't really relevant. You'll have to delve into Pro Presenter to find your answer as to how you share content without the cursor.

That said, I'm still a little confused by the line:

> Position of the mouse on main system when it's being controlled remotely

That implies you have at least three systems involved - the 'main' system that's running the presentation content, a remote system that you're using to control it remotely, and a (set of?) display system(s) that are displaying the content. Is that right? Otherwise, why are you controlling the main system remotely?

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Answer 6

MerlionRock Author

Level 1

8 points

Nov 8, 2025 12:13 PM in response to Camelot

The main issue I have here is not the mouse cursor appearing on external display.

That's ProPresenter's issue.

The main issue is not able to control the main system with the default Screen Sharing application on another system.

There are only 2 systems.

The issue described is only the main system (the system I'm controlling) and another mac system that use to control the main. Issue happens without ProPresenter running.

Controlling remotely is just to do administrative stuff so that one won't have to physically go on site.

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