I'm not sure if this is a display or a mouse issue. I have had my 24" iMac since June and have just started having this issue. I cannot click (left or right mouse button) on one specific part of the screen. I can click on links and buttons, form boxes, bring up the contextual menu (right click) or do pretty much anything you do with the mouse on most of the screen. However in this approximately half inch high and a few inches long area just above the middle of the screen on the left hand side there is no response from computer when clicking with the mouse. I can click on a link in the browser above this space and below it but not on the link in it. If I move the browser window so that same link appears in a different part of the screen I can click on it fine and cannot click on the link now in the affected area.
This is the same for any clickable item placed in this area of the screen. Is this a display or a mouse issue?
iMac 24",
Mac OS X (10.6.1),
Standard mighty mouse
Log off and log in to the new account. This will help to narrow down the cause. If the problem does not recur in the new account, the cause is likely to be in your normal user account. If the problem does recur in the new account, then the cause is likely to be related to the overall system installation, or some odd hardware-related issue.
If you have an external drive that can be erased, you could try installing a new system there and setting the Mac to boot from it. That will determine if it is related to the current system installation, or if it is more likely to be a hardware problem. You can obviously also back up your data, erase your internal drive, and reinstall a new system there.
Alternately, as a test, you can just startup from your Mac OS X installation disc. At the first installer screen, go up to the menu bar. Under
Utilities, run Disk Utility. Move the Disk Utility window around the screen as needed to see of the same problem exists while booted from a different system. If it happens there, then it is more likely to be some odd hardware-related issue. If it does not, it is possible a fresh system installation will resolve the problem.
Excellent troubleshooting advise there Ken, your the man! I also thought of booting the Install Disk or Backup Drive and checking the dead spot, but you beat me to it.
May be no help at all, but this used to happen when people used the Minimize Desktop option in OnyX. Haven't seen it since 10.3 or so, but it's worth mentioning.
OK I finally figured out what the problem was. I noticed that the unclickable area was directly in line with the top of the dock (I have the dock on the left side of the screen). I moved the dock to the right and the problem went away. I had previously changed the image files for the dock on the left in order to make it transparent. It appears this somehow affected the area of the screen next to the dock, hence the lack of the problem when the dock was on the right (the images files are separate for each side).
I can now click again but am back to the regular dock which I hate. Does anyone know of a way to make the dock transparent on the side?