Universal Control randomly swaps sides

Hello MaFooo,

We understand you're having an issue with the Universal Control randomly swapping sides. We'd like to help.

Try the steps below for help with arranging the display to how you want them to be.

Let's first ensure that it is set up how you want it just to ensure that no setting was changed by mistake.

"On your Mac

1. Choose Apple menu  > System Settings (or System Preferences).
2. Click Displays.
3. If using macOS Ventura or later, click the Advanced button at the bottom of the settings window.
4. Turn on “Allow your pointer and keyboard to move between any nearby Mac or iPad.” Leave the other Universal Control settings turned on for now."

"Next follow the steps below for help arranging the displays.

Arrange your displays

Arrange your displays to adjust where your devices think they are relative to each other. You can then move the pointer more precisely in the direction of each display.

1. On your primary Mac, choose Apple menu  > System Settings (or System Preferences).
2. Click Displays.
3. If using macOS Ventura or later, click the Arrange button.
4. The settings window shows an image representing each device's display. Drag the image of your iPad or other Mac into position relative to the other displays: to their left, to their right, or below them. A Mac display can also be positioned above other displays. Don't see your display?"

Universal Control: Use a single keyboard and mouse between Mac and iPad

Let us know if you have any questions.

Thank you for using Apple Support Communities.

Take care!

Hello MaFooo,

We appreciate the update! From here, we'd recommend ensuring that your macOS version is up-to-date as it can often resolve abnormal behavior such as you're experiencing. To do that, check out: Update macOS on Mac - Apple Support

If you're already on the latest macOS version, or this doesn't resolve the behavior for you, reach out to Apple for additional troubleshooting assistance at: Get Support

Thanks.

I have the exact same issue. iMac and Mfac book pro. The worst part is that I'll be working on one and suddenly the focus (keyboard and mouse) moves to the other computer and the order has changed. Totally random. Whatever this advice here of "make sure to upgrade" is definitely support-speak for "I don't have a clue". If you find resolution, please post as this is a frustrating random behavior.