Member Avatar for eddyk

Hi,
For some reason my mouse won't scroll up. I like to use the center button a lot. It moves down fine, but if I want to go to the top of the page it wont let me.. Please help I am going nuts. It is the mouse that came with my mac, not wireless. Model # A1152
ed

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Dani AI

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A short diagnostic checklist that complements the suggestions from and and helps pin down whether the A1152 is failing or the Mac environment is at fault.

Start by isolating hardware vs. software. Test the A1152 on a different computer (Mac or PC). If the same one-way scroll appears there, the mouse itself is almost certainly faulty. Conversely, plug a known-good USB mouse into the Mac in question; if that mouse scrolls both directions normally, the problem is confined to the original Mac environment.

Check for system-level interference and user-profile issues. Boot the Mac into Safe Mode (this disables third-party drivers and login items) and see whether the middle-button autoscroll behaves differently. Also create a fresh user account and test while logged into it; a working middle-click in a new account points to a user-preference or login-item conflict rather than hardware.

Confirm the Mac actually sees the mouse on the USB bus. From Terminal, run:

system_profiler SPUSBDataType | grep -i mouse

The mouse should appear in the USB device tree. If it does not, or it shows intermittent connection, suspect a USB/cable problem or a failing device. If the device is present but behavior changes between Safe Mode/new account and the normal session, check for any third-party mouse utilities (examples: USB Overdrive, SteerMouse, BetterTouchTool, Logitech Control Center) and temporarily disable/uninstall them to test.

If tests point to hardware failure (same fault on another machine, missing or flaky USB listing), replacement is the pragmatic route; for Macs still under warranty, contact Apple Support. If the issue appears software-specific, consider removing suspect utilities, applying macOS updates, and as a last resort following Apple’s guidance for NVRAM/SMC resets or reinstalling macOS.

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Member Avatar for Stylish

System Preferences -> Keyboard & Mouse -> Mouse (tab/button)

Might find something under there for your mouse.

Member Avatar for Member #443652

It might just be dirty, occasionally my mighty mouse refuses to scroll down so i just sit and swivel the ball around to get whatever might be caught out of it. That has always fixed the problem for me.

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