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Q: My USB mouse only scrolls in one direction (up)

I've had this problem intermittently for a while, since 10.6, maybe before.  The scroll ball on my USB mouse attached to my Mac Pro 1,1 only seems to work in one direction:  up.  I've updated the software several times (now at OS 10.7.3) to no avail.  It's really annoying!

Mac Pro, Mac OS X (10.7.3), 12 GB RAM, 500 GB hard drive

Posted on Feb 26, 2012 8:19 PM

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Q: My USB mouse only scrolls in one direction (up)

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