Member Avatar for arjun_8

I just upgraded the software to OS X Sierra and I use a multi usb port for connecting my mouse since there are just two usb port and the harddisk has to be plugged in directly. The light appears at the bottom of the mouse which means that the power is reaching the mouse but the mouse isnt detecting. Can anyone tell me what I should do to get my mouse working and it works fine on pc.

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  • Latest Post Latest Post by Steve_52

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Given ’s details (macOS Sierra, mouse LED on but no pointer, using a multi‑port USB hub, mouse works on PC), the most likely causes are the hub not passing data or a macOS-level conflict rather than a dead mouse. The visible LED only shows power; it does not prove the Mac is enumerating the device.

Recommended diagnostics (in order):

  • Connect the mouse directly to a built‑in Mac USB port (not the hub). If it works, the hub or cable is the problem — try a powered hub or a different cable.
  • Check System Report: Apple menu (top‑left) > About This Mac > System Report > USB. If the mouse does not appear there, the Mac never established a data connection.
  • Inspect System Preferences: System Preferences > Mouse (and) System Preferences > Accessibility > Mouse & Trackpad for Mouse Keys or odd tracking settings that could block input. Also check Bluetooth if the mouse is wireless.
  • Look for third‑party mouse utilities or kernel extensions (USB Overdrive, SteerMouse, Logitech software). Uninstall or update them and reboot.
  • Reset SMC and NVRAM and test in Safe Mode (restart while holding Shift) to rule out firmware or startup‑item conflicts. For SMC/NVRAM steps, follow the procedure appropriate to the Mac model.
  • Create a fresh user account to exclude per‑user preferences.

A full disk format/reinstall is an extreme last resort and rarely necessary for a mouse‑recognition issue. This approach follows ’s point about checking system detection and aligns with ’s suggestion to suspect the port/hub — but prioritizes non‑destructive checks first. If the mouse still fails after these steps, hardware inspection at an Apple service provider can confirm whether the Mac’s USB controller needs repair.

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Member Avatar for rubberman

The update may have altered device settings. Check there to see if the mouse is detected, but not enabled.

Member Avatar for Steve_52

I am pretty sure that the problem is with the port and if not, try formatting.

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