Recent switcher to macos. I can't find a way to separately set mouse acceleration and scroll wheel momentum.
I use a trackball for RSI reasons, in order to get across the screen in a single flick means high sensitivity, mouse acceleration is absolutely needed to be able to make small movements. This makes my scroll wheel useless because a single scroll moves the page about 1/10 of a line
Have you tried Better Mouse? IIRC, it can set different settings per HID.
I will pile on here and claim Apple is shockingly hostile to accessibility. From the weird way tabs work for focus to the limited options for text clarity, to the lack of control for mice customization, it feels like it has been a low item on their priorities for some time.