Need to reinstall ical

Question

ical will not open anymore: "application is damaged or incomplete". downloaded ical from apple wep 1.5.5, but installation is not possible. what do i do wrong or how can i get back my ical on my mac book pro?

Answer 1

Hi Terri,
It sounds like you have a data corruption of some sort in your user data. Make a new user and try using iCal in the new user account. If this works ok then the problem is within your user account.
If so, try these things in order to see if they will help:
0.
Backup you iCal data.
Open iCal and go to the File menu and choose Back up Database... to save a copy of your calendar data to your Desktop, just in case something goes wrong.
1.
Refresh your preference files.
There are some preference files related to iCal in your user's Library > Preferences. These are called:
com.apple.iCal.alarmsCache.plist
com.apple.iCal.AlarmScheduler.plist
com.apple.iCal.helper.plist
com.apple.iCal.plist
Quit iCal and move these files to your desktop. When you start iCal they will be re-created in the Preferences folder with the default values as needed. This does not affect your calendar data, just preference choices.
You should go into iCal preferences and make any changes you want there after doing this.
If this solves your problem there is no need to do any of the following.
2.
Check the calendars in turn.
In iCal un-check all the calendars in the list. You can do this by Command-Clicking one calendar's check box.
Then do the following with each calendar in turn: Check the calendar's check box and see if your problems still exist. If iCal seems to be ok, then un-check the check box and select the next calendar. If the symptoms still exist then this calendar is probably corrupted.
If you find a corrupted calendar in iCal, select it in the calendar list and from the File menu choose Export.. and export a copy of the calendar to your Desktop. Still in iCal, from the Edit menu choose Delete to remove the calendar from iCal. Then from the File menu choose Import... and select the 'Import an iCal file', find the calendar file you saved to your Desktop and import it.
(BTW The iCal calendar data is stored in your user's Library > Application Support > iCal.)
3.
Reset sync history.
If you have sync'd your calendar data there may be a corruption in the data stored by Sync Services which will be passed back into iCal when it syncs next.
Open iSync and from it's preferences select 'Reset Sync History' and in the confirmation dialog choose 'Reset Sync History' again.
I hope this helps to solve your problems.
Best wishes
John M