iMac Pro Sonoma 14.4.1 Mouse Pointer stops and jumps all the time

1) Try cleaning the sensor on the bottom of the mouse.

2) Test using a non-glossy solid colored black, blue or gray mouse pad.

3) Test using a different wireless or USB mouse. (most any USB Logitech or PC mouse will work)

4) Re-arrange your setup so that USB cables, drives and other device are not near or in-between the Mouse and iMac.

see > Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support

KEForex wrote:

I tried disconnecting the USB cables I had plugged in, the issue continues.

The Logitech mouses I've tested used a USB dongle to work. I am back now to having just the magic mouse connected, and even when turning off the apple keyboard and using just the mouse as a test, the cursor still stops and then jumps.

I have also tested with an old apple USB mouse and the pointer has the same behavior.

OK thank you. That pretty much rules out USB interference.

I'm thinking it could be something to do with the screen resolution - even though it's at the default/recommended setting. This has been happening for a long time, I'm just to the point of not wanting to deal with it anymore as it's very annoying when trying to work with Logic or any other software. I'm not sure how to insert a video here (other than a YT link) otherwise I'd record the screen showing this pointer jumping.

Which now points more toward a un-responsive process or a resource problem.

What you need to find out, is get and run EtreCheckPro on your iMac. https://etrecheck.com/en/index.html

Then post the EtreCheckPro Report, as per > How to use the Add Text Feature When Post… - Apple Community

High Speed USB cables, drives and devices can cause Bluetooth interference.

Like the Magic Mouse, those Logitech Mice are Bluetooth.

Next I would test a USB mouse.