I'd like to see a detailed description of the problem if some kindly soul would oblige. I don't know if the problem I have is the one this thread addresses or not. I'm running on a Mac Studio M1 Max, currently on 14.4.1. I've had the Mac Studio for around 2 years now. I upgraded from a 2017 27" iMac. I was using a Logitech MX Vertical Ergonomic mouse on the iMac and it was working fine.
I attached that mouse to the Mac Studio and since then, or since one of the transitions to macOS 14.x (it's been a while):
When selecting some text by holding down the appropriate mouse button, dragging across the text I want, then releasing the button, it will generally only select a portion of the text as if a very rapid disconnect-reconnect occurred. I can select all the text I need by clicking the mouse once at the beginning and then again at the end. This sort of stuttering happens with any dragging action.
I tried a replacement of the same mouse but it had the same problem.
Logitech can't help. But there are a number of threads about this problem with people saying it's caused by interference between wireless routers and the wireless signal (from the Logitech USB wireless dongle) to the Logitech mouse. The suggested solution is to move the router away from the Studio. That doesn't work for me. I've tried connecting the mouse to the Mac Studio and to a Mac Studio display by cable, and have tried connecting the mouse via Bluetooth, with no success.
I've also tried an Apple Magic Mouse. The Apple mouse has only infrequent stuttering (only very occasionally compared with the Logitech mouse).
I've come to the conclusion that either macOS can't keep up when switching between tasks and thereby loseing information from the mice, or there's something wrong with the Mac Studio hardware. However, when reading this thread, I can't tell whether the disconnections described here reconnect extremely quickly as in my case, or whether the disconnections described here are different, in-as-much as it seems the reconnections are much slower than I experience and/or they they require some action to force the reconnection.
By the way, I've noticed that often, running tasks don't seem to be released from the processors to allow queued processes to have a turn (delayed task switching). I have 32 GB memory on my Mac Studio and generally less than half of that is used, with the remainder occupied by cache. There is generally no swapping in and out of memory and no memory compression. Otherwise the system can seem quite fast. I can't make sense of this.
It seems farfetched that any of my suspicions of the SW or HW are real. But clearly quite a number of people are seeing real problems that I would think Apple would be concerned about. It's been going on for far too long without Apple fixing it.
Any comments are welcome.