Mouse polling rate is locked to 120Hz after upgrading to MacOS Tahoe

I put your issue to an AI / LLM, just to see what it may have said 

Results below

Bluetooth polling rates on Apple computers are often limited to around 125Hz for mice and keyboards, leading to choppy cursor movement on high refresh rate displays, though some reports suggest macOS Tahoe has improved this. This limit can be frustrating, especially for tasks requiring precision like gaming or high-resolution work. Users often find a smoother experience by using a 2.4 GHz dongle instead of Bluetooth or by using a Mac's built-in trackpad.  

Understanding the Polling Rate

• What it is: The polling rate is the frequency at which a device (like a mouse or keyboard) communicates its position or status to the computer, measured in Hertz (Hz). 
• Lower vs. Higher: A higher polling rate (e.g., 1000Hz) means more frequent communication, resulting in smoother and more responsive input. A lower polling rate (e.g., 125Hz) has less frequent communication, which can lead to jerky movements on the screen. 

Why Bluetooth on Macs Is a Problem

• Hardware and Software Limits: The primary issue isn't necessarily specific to Mac hardware but rather how macOS manages Bluetooth connections. The Bluetooth connection itself inherently has limitations that prevent higher polling rates. 
• Display Refresh Rate Discrepancy: This issue is more noticeable on MacBooks with ProMotion displays (120Hz), as the mouse's lower Bluetooth polling rate can't keep up with the high refresh rate of the screen. 
• Inconsistency: The problem can also be exacerbated by other factors, like the computer waking from sleep, which might cause the Bluetooth polling rate to drop further. 

What You Can Do

• Use a Dongle: A dedicated 2.4 GHz USB dongle bypasses the Bluetooth limitations and can achieve higher polling rates, often 1000Hz or more, providing a much smoother experience. 
• Try the Trackpad: Apple's built-in trackpads generally offer a much smoother and more responsive experience because they have a higher polling rate than most Bluetooth mice. 
• Check for macOS Updates: Some users report that the issue has been significantly improved with macOS Tahoe, suggesting software updates can make a difference. 
• Connect via Wired USB: For the most consistent and responsive performance, a wired mouse is still the most reliable option. 

maybe the macOS update means logitech needs to update their options+ software?

vdzundza wrote:

I figured out that polling rate is strictly limited by monitor refresh rate, if I set 47,95 I get maximum 40hz.

That seems to make sense... after all, your mac cannot refresh the cursor position on screen unless it is refreshing the display. Otherwise it's like the hand is quicker than the eye :-)

vdzundza wrote:

I am using Logitech Superlight pro 2 mouse, before upgrading I had 5-6k hz on any online web test

Now I got only 120hz.

How to unlock it again?

No idea. You might ask Logitech.

and Why just 120hz?

This is a user forum. No one here can answer why Apple does or doesnt do anything.

vdzundza wrote:

Haha, you must be kidding me.

Before the upgrade, I was getting 5-6k Hz on any online web test. "Before the upgrade" means I performed the same test on the previous version. The fact that I was getting 5-6k Hz proves I wasn't using Bluetooth (or a wired connection, which is limited to 1 kHz); I was using a special dongle. I can provide screenshots from the previous version to prove this.

There is no need to be confrontational

Perhaps the user ( you ) , may take specific notice of the Source of the Information and arrive at whatever conclusions they believe is correct

vdzundza wrote:

I am playing shooter so it's mandatory

Ah! So indeed, the hand is quicker than the eye 😁