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Q: I installed a mac update and restarted. I shut down for the night. The next time I started up the mouse ball would not scroll down ... I installed a mac update and restarted. I shut down for the night. The next time I started up the mouse ball would not scroll down but it would scroll up. Any ideas?. more
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Feb 9, 2012 12:35 PM in response to stephenfromwilloughbyby baltwo,http://support.apple.com/kb/HT3226 near the bottom.