I just upgraded to 10.7.5 and have the same problem with one exception. The Mouse button assignments don't revert back in the System Preferences panel. The assignments stick, but they don't anything.
Left/Right/Trackball Buttons = Primary Button
Side Buttons = Off
So much for Apple products "Just Working".
I may have found a solution by deleting two preference files:
This will work if you are using a standard USB Apple mouse.
In your user account locate Library (hidden) then the Preferences folder. Delete the following files:
Then logout of the user and log back in again.
This effectively rebuilds your mouse preferences. If you have a wireless mouse or another mouse, there may be other drivers above or below these entrys which you could try to delete, but I definately don't suggest you do this unless you know exactly what you're doing!
Find below a screen shot of the finder path:
Hope it helps!
thanks I will try this with my original Apple Bluetooth mouse.
I went ahead and bought a new magic mouse and what happened is that the mouse preferences screen changed to a different look, and suddeny all functions work properly.
then I tried reconnecting the old bluetooth mouse and still it would not work. even though the preferences had not changed.
will try your method above and report back to see if I can get the older bluetooth mouse to work.
hi again. i tried trashing those drivers, the two seleemmartin detailed above. Alas, it did not work for me. so I guess apple just got another $69 from me for a new magic mouse since i need that right click function. I like the magic mouse, definitely smoother and feels better than the mighty mouse, Just unfortunate and a bit shady that they don't come out and tell you the things that won't work, that you'll have to buy, in order to fully use the new OS.
I mean, a mouse? And an Apple mouse at that.
I had same problem, but once the right button was set as primary, neither button were capable of clicking, dragging or toggling anything in any of the preference panes.
I booted into safe mode and was able to correct the setting on second attempt. First attempt quickly reverted to corrupted state.
Problem has not resurfaced.
I have an Apple magic mouse with my iMac, running OSx 10.6.8.
About a month ago I suffered a hand injury and so decided to switch my primary and secondary buttons on my mouse. I'm ready to start using my hand again, but now for some reason I cannot seem to find the option in Preferences/Mouse to change the buttons back.
All I have are the Tracking, Scrolling and Double-click options (see attached screenshot) and there is no sign of the option to switch prim. and sec. buttons again.
I uninstalled a graphics tablet I had, I turned the mouse off and on again, I restarted the computer, I googled for answers but no luck.