How to cure an erratic mouse?
iMac (OS 10.11.6). Mouse is acting erratically - cursor is jumping all over screen.
I'd appreciate any suggestions.
iMac 21.5″, OS X 10.11
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The following will require any USB keyboard and mouse. If you don’t have them, borrow or buy them, they are inexpensive!
- Connect the USB keyboard and mouse to the computer.
- Open System Preferences – Bluetooth
- Un-pair the wireless keyboard and mouse.
- Turn off Bluetooth
- Restart the computer in Safe Mode per the directions in https://support.apple.com/en-us/HT201262
- Restart the computer normally.
- Open System Preferences – Bluetooth
- Turn on Bluetooth
- Re-Pair the wireless keyboard and mouse.
- Unplug the USB keyboard and mouse and begin testing the wireless devices again.
