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porkchop1973 Author

Level 1

4 points

Mouse malfunctions when external monitor is plugged in to MacBook Air

I have a MacBook Air (2015). The screen size is small, so I have purchased a Samsung external monitor so I can see my clearly. However whenever I connect the monitor, the mouse cursor goes crazy and makes the monitor unusable.

The cursor enlarges and bolts all over the external screen.

When I disconnect the monitor, my bluetooth mouse and trackpad mouse work fine.

Can anyone explain this and advise me if there is a way to fix it please?

Thanks

Posted on Sep 24, 2020 1:42 AM

Top-ranking reply

Alwayswantingtohelp1

Community Specialist

Posted on Sep 30, 2020 2:37 PM

Hello porkchop1973,

Thank you for using Apple Support Communities!

We understand from your post that your mouse is all over the place when using your external monitor. Make sure the monitor you have is compatible with your MacBook Air. This article will tell you the types of displays that can be used with each Mac model:

Use external monitors with your Mac - Apple Support

Also check the manufacturers website and make sure the monitor is compatible with macOS.

Best Regards.

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Mouse malfunctions when external monitor is plugged in to MacBook Air

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