This article is going to help you resolve that annoying issue with Notes crashing on Mountain Lion. Boom!
Does Notes crash every time you try launch it and reporting the below error?
Application Specific Information:
*** Terminating app due to uncaught exception ‘MFSQLiteException’, reason: ‘checking for existence of object’
Looks like a serious issue but in reality its just your ‘Mail’ application database that needs to be upgraded.
Quick Fix:
Step #1 – Open ‘Mail’ and follow the instructional prompts to update the database.
Step #2 – Re-Open ‘Notes’.
You should now have a happy ‘Notes’ session running on OSx Mountain Lion.
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EDIT
We’re had reports of another error message affecting users with Exchange Accounts in Notes. This Quick Fix is for you:
Application Specific Information:
*** Terminating app due to uncaught exception ‘NSInternalInconsistencyException’, reason: ‘Folder class mismatch for{.
Quick Fix:
Step #1 – Delete your exchange account from the Mail, Contacts & Calendars pane in System Preferences.
Step #2 – Go to Finder, click “Go” in the menu bar, click “Go to Folder” and type in “~/Library” (without the quotes) in the box. This will take you to your user Library folder.
Step #3 – Use the search box in the finder and type in “com.apple.notes” and click “Library” in the search bar that appears. This should now find several folders and files related to the Notes app. Rename or delete everything except the help files (with the lifesaver icons on them).
Step #4 – Restart your Mac. Put your exchange account back into System Preferences, you can go ahead and activate the Notes sync service.
Step #5 – Open Notes and it should be working now!
If this fix hasn’t resolved your issue or you have any questions just drop me a line in the comments section below.