Can't connect to my bluetooth mouse after upgrading to MacOS Ventura

hello,

You can try to reset your mouse:

1. Turn off your wireless mouse.
2. Hold down the left and right mouse buttons.
3. While holding down the mouse buttons, turn the mouse back on.
4. After around 5 seconds, release the buttons. You will see an LED flash if it resets successfully.

Or you can try to reinstall macOS without loose your data via recovery.

A lot of people are having the exact same issue, precisely after the update to Ventura. I waited to 13.1 update to see if they would fix this but neither Apple or Corsair seen to care (also no firmware updates for the mouse). I find it very inconvenient to carry a dongle everywhere I want to use my mouse (which I've been doing for months now), so I'll probably just buy another bluetooth compatible one. It's really bizarre that a specific Corsair mouse would stop working via bluetooth after an OS update.

I've just tried to reset it and it doesn't help it at all, it still fails to connect.

resetting the mouse worked perfectly for me, thank you.