Trackpad lags, cursor moves all over on its own
Not sure what's happening but it's driving me nuts. The cursor either lags or if it waits, it moves all over on its own. It's like it's completing tasks from before. Then it runs fine and all of a sudden, I can't get it to go anywhere. Seems to have a life of its own. I've looked at preferences but don't see anything I can alter. It seems to have just happened on its own. What can I do?
mac pro