I will restate. I cannot move a window by dragging. I cannot open anything by double-clicking on a file or program. I cannot select anything with my mouse, BUT I can see the cursor move around the screen. It is useless. I cannot close a file by clicking on the red button in the upper left corner. I cannot set the cursor anywhere and begin typing. I have used Macs for 17 years. This is NOT normal behavior. It stopped suddenly one day. All preferences are set to normal settings.
Problem solved thanks to Eric Cote:
"you may want to trash your preference files under:
Users/<your user name>/Library/Preferences/com.apple.driver.AppleHIDMouse.plist
then reset the mouse prefs"
Thank you Eric!
It has reverted to "not working" once again, and now there is no more plist to trash, and even "safe-booting" does not retsore mouse functionality even temporarily.
Again, mouse will not left click ANYTHING; won't open windows, programs, files, nuthin'.
Right click will pull down menus, like, for example, System Preferences, but i am unable to click on any icons in the window.
The ONLY way to close a window now is command-w. Nothing else works.
Question: will upgrading to Lion give me a clean slate? and ca I upgrade to lion without a mouse?