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  • EminenTone Level 1 Level 1

    Did this not work for you: APPLE SUPPORT RESOLVED THE ISSUE FOR ME.  Your "time", "Time Zone" and or "Region" on your Mac, and or Icloud are out of sync (set differently). In my case, it was the region was set to cusotm verus United States. On your MAC click on the time, go to time date preferences. Click SHOW ALL, then go to LANGUAGE & TEXT, then REGION. Make sure it is set to your region and the right TIME ZONE. Then do like for Icloud. It fixed my issue and I hope this helps you too, becuase now I can send and recieve calendar invites that actually go to the right place on my calendar! HOPE THIS HELPS!

  • RSli Level 1 Level 1

    This is a joke, right?  New software is to improve things, not take them away.  There is nothing that I could find in the documentation or HELP screens that explains the .ICS change.  Given how much Mountain Lion is touted, I don't see the improvement in the business functionality at all.  I struggled for a couple of weeks with this, spent three apointments at the Genius Bar, spoke with an instructor, etc. and none of them knew that the double click and preview feature were gone--and this is a busy Apple store.  Only when the tech read the on line forum ( in prep for my third visit) did he figure out that it was a deliberate change, not a bug.  My comment to Apple--are you striving to be like Microsoft?--ie, we know when the user needs to change, and by god, they will.



    "Still a loyal customer of Apple, but disillusioned with someone's bonehead marketing decisions."

  • JEKing Level 1 Level 1

    I haven't tried turning off Icloud, but aside from that, none of the other suggests seem to have worked.


    Has there been any permanent solution that Apple has recommended for this problem?  It's a real problem, and if it's not solved I'm going to have to switch to something more reliable like a google calendar....which would disappoint the **** out of me!

  • scotteyevero Level 1 Level 1

    It's actually an easy fix (at least it was on my machine).


    It seems that iCal has difficulty distinguishing old .ics files from new ones in the mail downloads folder. Thus, I simply went in and deleted all old .ics files from the mail downloads folder and all has worked great since.


    Hope that helps!

  • charlesknightsbridge Level 1 Level 1

    Thanks scotteyevero - perfect solution. But finding hidden files? I keep forgetting how (please don't any post to tell me) so just used Terminal to kill the ics files.

  • mrabne Level 1 Level 1

    I was having this problem just now.  I could not get .ICS files to add to Calendar.  And I just fixed it.  I went into Finder and found a file with an .ics extension and did a COMMAND-I and looked at the Open With setting.   Mine was set to and I just changed it to   That fixed my problem.




  • funkymunky14 Level 1 Level 1

    worked for me

  • pansophic Level 1 Level 1

    What I just discovered was that during an upgrade (to Mavericks in my case, but probably true in other upgrades) Apple decided to recreate my local calendar (which I had deleted many versions ago) and add the new events to my local calendar which was not being displayed.


    I first enabled the local account and made the events visible (clearly showing the ICS events I had tried to import).  I then deleted the local account again.  Now when I click on ICS iCal correctly adds them to my preferred calendar (which would never be a local calendar).


    VERY frustrating Apple!

  • sliv Level 1 Level 1

    I've been seeing this issue both with Mountain Lion and now Mavericks. Though I would say in my case, it's always the meeting requests coming from the same person who are on an exchange server with Outlook 2010 (I believe) sending the requests.


    I've gone through all of the fixes here to no avail. FYI - the Mail Downloads folder is now buried in Mavericks: ~/Library/Containers/ Downloads and they're spread out across multiple folders, so I just did a search for .ics to find them all. Since I seem to only have issues with the one client's meeting requests, I'm thinking Apple Mail 7 and Outlook 2010 on an Exchange server do not play nicely together.


    Adding insult to injury, most of the meeting requests are actual cancellations from reoccuring weekly meetings. When I do a QuickLook, I can see the meeting to remove, however it doesn't tell me what date the meeting is on! The only thing I can do is save the file to my desktop, view it in Finder and the preview icon tells me the date and time.


    Between this and Mail not pulling down my emails on an IMAP account without restarting Mail every ten minutes, Mavericks has not be as exciting of an upgrade as I had hoped. It feels like a rushed product with the expectation to fix bugs as they come in. This was one of the main reasons I went away from Windows.

  • Jeffery Nunes Level 1 Level 1

    i seem to be having the same problem with ical/calendar.  i'd switched to busycal some years ago on all but 1 of my computers.  1 computer has remained on 10.6 and my old ical in 10.6 does copy the ics into my calendar.  unfortunately, it has a bug where it never sends a reply for an accepted meeting.  so i've used it as read only and used busycal on my other mac to accept/send calendar invitations (.ics)...


    I had some difficulties with a recent update of busycal.  so i'm trying to switch back to calendar now and calendar (10.8.5) doesn't seem to be copying ICS files into calendar at all.  these same .ics files will get copied into my calendar in 10.6.8 when i try them.  after clicking on .ics, calendar opens, but it never copies in anything. 


    interesting, i'm just checking the console logs, and i see an entry when trying to import the .ics files...

    " interval maximum value is 946100000 seconds (specified value: 9223372036854775807)"

    this entry is from 10.8.5.  i see no such error in 10.6.8...


    it seem surprising that these are programs are so flaky since client server syncing basics was worked out for IMAP so many years ago...  yes this is a different protocol, but it was largely patterned after email protocols... 



  • Lonnie Robinson Level 1 Level 1

    I was having problems with this also and just found a way to make it work.  I drag the .ics file to the name of the calender in my list of calendars I want it to go into and it accepts it.  Double clicking on it would open iCal but nothing happened. Dragging it to the iCal window did nothing either. But if I drag it to the calendar list and drop it on the calendar I want it to go into it works.




  • robbie137 Level 1 Level 1

    I too am having this problem with some .ics files.  None of the workarounds in this thread work for me.  I have to manually enter the appointment into my calendar.


    When I quicklook, the event shows up with a gray background with a dotted it possible this is some sort of cateogry that conflicts with my icloud calendars, hence I don't see it?

  • Benzy72 Level 1 Level 1

    I'm also having this problem, specifically I'm trying to import an .ics file from iCal v2.0 on my old PB G4 (yes, I was overdue for an update!)


    Its not just a Mavericks problem because I'm using Mountain Lion 10.8.5 and its not just a question of switching to the (see mrabne's post) because that also doesn't work for me.


    This isn't an iCloud problem for me as I don't use that, nor do I receive .ics files from others. I'm just trying to transfer my old information to my new computer!


    Interestingly enough, its such a basic inherent problem that when I export the (empty) Work calendar from Calendar v6 and then try to reimport it right back into the same program, it says it can't read that .ics file either!


    I can't find any .ics files but the one for Timezone so I don't think that's the issue.


    I'm no crack, just a normal user. What am I missing? What can I try doing to solve this?


    This is very frustrating. After all this money spent on a new macbook, you would think my loyalty would be rewarded with some continuity and the ability to transfer such basic information as a calendar into a newer version of the very same program. This is one of the many issues I've had as I haven't been able to simply migrate because Tiger is already too old to bother making compatible even for a migration. Apple's lesson: Keep buying new (buggy) products and feeding the money machine or you'll be permanently cut off!

  • Tralfaz76 Level 1 Level 1

    Here's a workaround that's worked very well for me, which is based on the fact that the gmail app can handle outlook invites:


    1. Create a rule that sends a copy of all invitation requests to your gmail account


    2. Generate a link to your gmail calendar to be used for sharing


    3. Use that link to add a calendar to your iCloud account, which will sync with your gmail calendar


    4. Open your calendar invite from the gmail app. When you accept the invite it will notify the sender, the event will be added to your gmail calendar and then automatically be added to your IOS calendar.


    Once setup properly it works very smoothly. Hope that helps.

  • Jeffery Nunes Level 1 Level 1

    Hi Lonnie,


    I tried that on 10.8.5 today a couple times and it worked for me!  My test include both calendar invitations and a meeting cancellation notice.  Interestingly enough, some of these .ics files are not working on my iPhone.  But that is obviously a different thread.


    Thanks so much for the suggestion!  It would be very nice if Apple fixed this, but I can live with your workaround...