Periodically my cursor starts migrating to the top left of the screen - I've got no external devices plugged in, and Bluetooth is off.
This happens in Text Edit, and all text fields in Safari.
I've scanned for Malware, and run DiscDoctor.
But nothing helps.
Any ideas?
New MacBook Air
Yosemite installed
MacBook Air, OS X Yosemite (10.10.2)
Go step by step and test.
1. Restart
2. Shut down the computer.
Clean the trackpad with moist not wet microfiber cloth.
System Preferences > Point & Click
Try turning off three finger dragging and then turning it on after testing.
3. Is there any Bluetooth device nearby with failing batteries? If so, replace the batteries.
4. Reset PRAM: http://support.apple.com/kb/PH14222
5. Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
6. Close all windows and quit all applications.
Click the Spotlight -the magnifying glass icon- in the menu bar. Enter Disk utility in the box.
Select Disk Utility. When the Disk utility window opens up,
select Macintosh HD, then First Aid.
Click Repair Disk Permission
Ignore the time remaining estimate.
Last 1 minute may take longer.
@dominic23 Thank you very much for your reply. I tried all your suggestions but they didn't work.
However, I have successfully diagnosed the problem:
Using the 'Keyboard Viewer' app I can see that the Up Arrow key appears to be constantly pressed down - even though the key is not being pressed. So it's a hardware problem.
My current workaround is to use a USB keyboard and a small piece of sellotape on the Up Arrow key - I plan to visit the Genius Bar to get the problem fixed when I have time.
Thanks again,
MB
Cursor moves by itself
