I am running a Mac book pro OS X ver.10.10.5, 2.9 GHz Intel Core i7, 8 GB 1600 MHz DDR3
The calendar is locking up the computer to the point where a hard boot is needed.
It seems that the cal wants to add an event that is not compatible with something...
MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.5)
Mark,
Backup your iCloud Calendars, and any "On My Mac" calendars then disconnect from the internet.
Quit Calendar, then paste this text ~/Library into the Finder Menu>Go>Go to Folder...window and select "Go." This will open the Users Library Folder.
Then open the Calendars Folder which is in that Library Folder, and move any any files with "Cache" listed in the name field to your Desktop.
Next open the Preferences Folder in that same Library Folder and move the com.apple.iCal.plist file to the Desktop.
Log out/in or restart and open Calendar.
what is ical is on my mac
