Mouse occasionally double-clicking on macOS — hardware or software?

[Greey2026]

Hi everyone,

I’m running into an issue on macOS where my mouse sometimes registers a double-click even though I only click once. It’s not constant, but frequent enough to be annoying, especially when selecting text or dragging files.

Things I’ve already tried:
- Adjusting the double-click speed in System Settings
- Testing with different USB ports
- Trying the same mouse on another Mac (same behavior)

To rule out app-specific issues, I tested the raw mouse input using a simple browser-based mouse tester:

https://mousetester.net/en/mouse-tester

What I noticed is that occasionally two click events show up even when clicking slowly.

At this point, I’m trying to figure out whether this is almost always a failing switch, or if there’s anything macOS-related I should check before replacing the mouse.

Any advice or similar experiences would be appreciated.

 

[Boppi]

What mouse?
What Mac?
What OS version?

You didn't mention any pertinent info to be able to assist in a helpful way.

 

[Basic75]

Somebody you know must have an unused mouse in some box that you could try... I'd expect it to be a hardware problem. If all else fails just get any $10 office mouse, that's what I prefer over the Apple mice anyhow.

 

[hg.wells]

If you’ve tried it on different Macs it’s likely the mouse that’s the issue. What mouse are you using?

 

[Vincent Hanna]

I can’t believe this guy created a troubleshooting thread without trying a different mouse first.

 

[Greey2026]

I tried several times, and it should still be a hardware problem. Replacing the mouse will solve the issue.