Sometimes the text cursor stops flashing, and when I type nothing shows up. Then I click the mouse, and suddenly everything I just typed appears, and the cursor's frozen at a new location.

When I click inside the white area of the scroll bar, the page jumps and the cursor starts flashing again. Problem solved temporarily.

This started when I upgraded from 10.5 Leopard to 10.6 Snow Leopard. The answer to this question suggested that it was a mechanical issue with the mouse. For me it isn't, since I'm using the built-in trackpad.

Any ideas?

  • Sounds like it's struggling for memory. What RAM do you have in there & what apps do you have open? Safari or Chrome with a lot of tabs open will eat RAM. – Tetsujin Feb 5 '15 at 7:33
  • 4GB RAM. The problem still seems to happen even when the RAM isn't near-full, though. And it's different from general slowness, it's more about "jumpy" behavior. – jkdev Feb 5 '15 at 15:05
  • Sometimes I have lots of browser tabs open, but other times it's just a text editor or word processor. – jkdev Feb 5 '15 at 15:07
  • still sounds like it needs that time to page memory, to me. – Tetsujin Feb 5 '15 at 15:13
  • Maybe so. On the other hand, it only happens in one application at a time (if I switch to other applications they aren't affected). – jkdev Feb 5 '15 at 16:56

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