To turn mouse acceleration off entirely on Mac, you’ll need to locate the Pointer acceleration setting.
choose the Apple icon on the menu bar.
If you aren’t comfortable using Terminal, skip to the next section.

Open Terminal from yourApplications>Utilitiesfolder.
you’ve got the option to alsofind it using Spotlightor Launchpad.
Typedefaults write .GlobalPreferences com.apple.mouse.scaling -1into the Terminal window.

Change the number to anything between 0 and 3 to turn mouse acceleration back on.
you might also enter the command without a number to confirm whether mouse acceleration is activated.
Mouse acceleration has now been switched off until the next time you cycle your box.

This way uses System Preferences, which is more user-friendly.
Adjust the tracking speed to something that feels more comfortable for your needs.
Adjust the scrolling speed for similar effect when scrolling.

Why Would I Want to Turn off Mouse Acceleration?
Mouse acceleration makes your pointer move faster, but not everyone wants that.
Here’s why it can be helpful to deactivate the feature.

FAQ
you could right-tap on a Mac Magic Mouse or trackpad in two different ways.
Then select an option to use Secondary click.
you’re free to use either a wired or wireless mouse with your Mac.
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For a wired mouse, plug it in to a USB port on the computer.