That is a good suggestion. I wish I had thought of it.
It had no effect, though.
For good measure, after it didn't work, I deleted every reference to com.apple.iCal* or com.apple.Calendar* in ~/Library/Preferences, /Library/Preferences, ~/Library/Application Support, ~/Library/Preferences/By Host, and /Library/Application Support
Then I rebooted, just to be sure.
Again, iCal in my main daily use account has lost its Preferences pane. It's like the menu item (which flashes, as it should, when I select it or hit Command-,) has been reset to something else, somehow, or like the preference pane is being "displayed" somewhere else, or invisibly.
Hmmm... maybe I'll delete my finder plists and see if that helps. Maybe it's got some wonky screen coordinates saved somewhere.
Surely there must be some way to just wipe an application completely and start fresh SHORT of reinstalling the OS -- even one of Apple's apps. No?
In your first post of this thread you said, "I logged in as another user and opened Calendar. From there, Command-, or Calendar->Preferences... display the Preferences pane." That indicates to me that it is not a system wide problem, or an application specific problem which therefore eliminates reinstallation as a possible fix.
I suspect cache corruption may be the culprit. My recommendation would be to try a "Safe Boot."
You may also want to check System Preferences...>Keyboard Shortcuts for any unwanted changes.
Your logic on this being a one-user problem is sound. Your suggestion to look for unwanted keyboard shortcuts is a fair one too, but as I said, the Preferences pane is unreachable in this account by any method--even using the mouse to click Calendar->Preferences... So a keyboard shortcut isn't the culprit. Still, just out of curiousity, I added a new keyboard shortcut to call up that menu item (despite the fact that there is already one built into almost all apple software by default). No dice. It shows the same behaviour: the "Calendar" menu item flashes blue, as if one of its sub-menus had been activated (as it has) but the preferences pane still refuses to show.
I will try a safe boot, which I had considered briefly before work this morning but haven't tried yet.
nope. The same problem exists after a safe boot. Calendar's preference pane is accessible from other accounts, not at all from this account. Bizarre.
So the issue is definitely in my account, it's not a keyboard shortcut, and safe mode doesn't fix anything.
Ideas short of creating a new main working account and going through the tedious process of transferring / resetting everything I own?
Two things: I forgot to update my profile. I'm using Mountain Lion (so OSX 10.8).
Secondly, I was just thinking I should write to this discussion that I have a vague hunch that this behaviour is related to Mountain Lion's problems with MS Exchange Servers. I had been trying to get Calendar to work with my office's Exchange server when it crashed. On that hunch, just now I went to System Preferences... and disabled the Calendar (and Contacts) of the Exchange account (which are the only things I use the account for). That made the account inactive. I went back to Calendar and *boom* I am now able to see my Preferences pane in Calendar.
So the problem has stopped. Hopefully this helps someone else some day.
Just go to System Preferences and uncheck all the items for your Exchange account.
(Also, hopefully the forthcoming OS X 10.8.1 that will allegedly fix the MS Exchange support under Mountain Lion will render this post unecessary for future users.)
I am have EXACTLY the same issue, but I tried all these steps and even re-installed Mountain Lion, but my Preferences pane WON'T open in Calendar.....what is left for me to do?
Please anyone with some advice. Btw, when I go to Library -> PreferencePanes, the folder is entirely empty... I don't know if this is supposed to be like this or not, but just mentioning it in any case.
Please help me!!!