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Helpful answers
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Mar 28, 2012 3:48 PM in response to PKS2by MadisonP,Greetings,
What changed in the last week? Did you add a new calendar server (iCloud / Google / Yahoo etc.) or make other changes to the computer?
Try:
Go to Apple Menu > System Preferences > Language & Text > Formats > Region. Region should be set to the country of your choice. Do not have it set to "Custom" as this can have unexpected results in the iCal window.
If that doesn't resolve the issue:
1. First make an iCal backup: Click on each calendar on the left hand side of iCal one at a time highlighting it's name and then going to File Export > Export and saving the resulting calendar file to a logical location for safekeeping.
2. Go to iCal > Quit iCal
3. Remove the following to the trash and restart your computer:
Home > Library > Caches > com.apple.ical
Home > Library > Calendars > Calendar Cache, Cache, Cache 1, 2, 3, etc. (Do not remove Sync Cache or Theme Cache if present)
--- NOTE: To get to "Home > Library" in Lion: Click anywhere on the desktop and then click on the "Go" menu at the top of the computer screen while holding down the "option" key on the keyboard. You will see "Library" in the menu.
4. Launch iCal and test.
If the issue persists:
1. Go to iCal > Quit iCal
2. Remove the following to the trash and restart your computer:
Home > Library > Caches > com.apple.ical
Home > Library > Calendars > Calendar Cache, Cache, Cache 1, 2, 3, etc. (Do not remove Sync Cache or Theme Cache if present)
Home > Library > Preferences > com.apple.ical (There may be more than one of these. Remove them all.)
--- NOTE: Removing these files may remove any shared (CalDAV) calendars you may have access to. You will have to re-add those calendars to iCal > Preferences > Accounts.
3. Launch iCal and test.
Hope that helps!
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Mar 18, 2016 7:50 AM in response to PKS2by Matthew Goeckner,Note:
MS Exchange may be the issue. It does not support multiple alerts. I had the same problem - did all of the things suggested by @MadisonP - and it did not work. At that point I tried creating a new event NOT linked to Exchange - that allowed multiple alerts. When I tried to move it to Exchange - the extra alerts were deleted...
Bottomline: If you are working on an Exchange server - that is the problem.