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Mac Forum / General / General / November 2009



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Did Apple Change The iCal File Format From Tiger To Snow Leopard?

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Kurt R. Todoroff - 19 Nov 2009 15:56 GMT
I'm using a G4 iMac and 10.4.11.  My father uses an Intel iMac which was
running 10.4.11.  I have my own account on his Mac which I access via
VNC daily while he simultaneously uses his Mac in his account.

I use iCal every day for both personal and business issues.  It contains
over 25,000 calendar items in my personal and business calendars.  This
causes iCal to run very slowly.  I transferred the iCal folder (Zipped)
from ~\Library\Application Support to the same location in my account on
the Intel iMac.  I launched iCal and it was a speed demon with those
25,000 items.  It didn't even blink at them.  I used iCal on his Mac via
VNC for one week.  At the end of every day, I would copy the Zipped iCal
folder from my account on his Intel Mac to my G4 iMac.  Then I would
launch iCal on my G4 Mac and verify that all of my daily activity was
present.  It always was there.

Three days ago, I installed Snow Leopard on my father's Intel iMac.  I
love it.  Can't wait to buy a new Mac some day.  I continued to copy the
Zipped iCal folder from his Mac to mine everyday.  Yesterday, I launched
iCal on my G4 iMac again to verify that all of my daily activity from
the day was appearing in iCal on my Mac.  It didn't appear there.  Only
the previous data was there.  I repeated my copy procedure and it still
didn't work.  I exported my data from the Intel iMac iCal and then
attempted to import it into the G4 iMac iCal.  It would not accept the
import.

I am confused why the iCal data from the Intel iMac is not appearing on
my G4 iMac iCal.  I am using the same unchanged procedures to copy the
data from his Mac to my Mac.  I am fairly certain that I performed this
procedure after I installed SL on his machine, and that I did verify
that the correct data appeared in my iCal.

I hope that all of my iCal data are not permanently stuck on my father's
computer.

Any ideas or suggestion?

Thank you.

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Kurt Todoroff

    Markets, not mandates and mob rule.
    Consent, not coercion.

Tom Harrington - 19 Nov 2009 17:00 GMT
> I'm using a G4 iMac and 10.4.11.  My father uses an Intel iMac which was
> running 10.4.11.  I have my own account on his Mac which I access via
[quoted text clipped - 26 lines]
> procedure after I installed SL on his machine, and that I did verify
> that the correct data appeared in my iCal.

I don't know what you did, and it sounds like you're not 100% certain
either.  Snow Leopard includes iCal 4.0; my remaining Leopard machine
has iCal 3.x; god only knows what version you have under 10.4.11.  It's
not the least bit surprising that iCal might have changed its file
format somewhere over the past few years.

On SL you could export the calendar info into a common format that I
believe could be imported on the older Mac.  That'll get the information
over but I think you'd get duplicates unless you first deleted the
corresponding events on your Mac.

If you're only going to edit the info on your father's Mac, you might
consider publishing the calendar on MobileMe or a private server, and
then just subscribing to the calendar on your Mac.

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Tom "Tom" Harrington
Independent Mac OS X developer since 2002
http://www.atomicbird.com/

Kurt R. Todoroff - 19 Nov 2009 21:47 GMT
> I don't know what you did, and it sounds like you're not 100% certain
> either.  Snow Leopard includes iCal 4.0; my remaining Leopard machine
> has iCal 3.x; god only knows what version you have under 10.4.11.  It's
> not the least bit surprising that iCal might have changed its file
> format somewhere over the past few years.

Hi Tom,

I am confident of each of my actions throughout this process, except
that I don't remember if I copied the iCal folder to my G4 iMac and then
tested it after I updated my father's Intel iMac to SL, as I did several
times prior to the SL update.

> On SL you could export the calendar info into a common format that I
> believe could be imported on the older Mac.  That'll get the information
> over but I think you'd get duplicates unless you first deleted the
> corresponding events on your Mac.

I tried this shortly after I posted my message this morning, and it
worked.  First, I exported the calendar (xxx) that was on the Intel
iMac.  Then, I copied it to my G4 iMac via MobileMe.  Then, I deleted
the entire calendar of the same name and filename (xxx.ics) from my G4
iMac iCal.  Then, I imported the calendar of this filename (from the
Intel iMac) to my G4 iMac iCal.  It worked perfectly.  There were no
duplicates.

> If you're only going to edit the info on your father's Mac, you might
> consider publishing the calendar on MobileMe or a private server, and
> then just subscribing to the calendar on your Mac.

Actually, I want to get to the point where I am updating my G4 iMac iCal
from the Intel iMac iCal via my MobileMe account until I can buy a new
iMac.  With so much on my plate at this time, I'm not there yet.  Thank
you for the suggestion.

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Kurt Todoroff

    Markets, not mandates and mob rule.
    Consent, not coercion.

 
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