Sync calendar problem

MacBook late 2008 10.2.9
iPad mini and iPhone 4s both 7.0.4
iCloud account
Hi,
I am reposting the question because, although the first post yesterday received no replies, the solution to the problem is so important to me that I am trying again. If this post receives no replies, I promise not to post again!
I have the three devices listed above and everything updates and transfers between them successfully except for iCal. This is only a recent development as iCal did used to sync until about a fortnight ago.
For example, if I work on the MB and make changes in, say, Notes, these changes are successfully transferred to the iCloud account and both the iPhone and the iPad.
When I make changes on the MB in iCal, they get successfully transferred to the iPad, but NOT to iCloud or the iPhone. Naturally, this is the device that is most important to me day-to-day!
Settings on iPhone and iPad seem to be the same i.e. Settings: iCloud: Calendars - green for yes.
Syncing iPhone in iTunes does not solve the problem.
Even ‘Reset documents and data’ on iCloud has no effect.
This is driving me nuts! Any ideas?
Thanks,
Graham

I am having the same exact problem as Mr Mason. Any suggestions would be appreciated.

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TS2634 My problem - when syncing and error messages comes up: iTunes could not sync calendars to the iPhone because an error occurred while margin data." I've tried turning the phone off and back on, & tried both USB ports but get the same thing. What

My problem - when syncing and error messages comes up: iTunes could not sync calendars to the iPhone because an error occurred while margin data." I've tried turning the phone off and back on, & tried both USB ports but get the same thing. What can I do next since it doesn't give me even one clue as to what the error would be?

Before I started to resync calendars one by one as suggested in the troubleshooting article, I remembered something that came up in a sync when I first attempted : a 'which one do you want to keep' message about a repeating calendar event, which came up with three options, one from Calendar, and two from iCal on the phone. I deleted that event, then went through the calendar resync one by one, and all seems OK now.
In Music there is a way to find 'ghost' items that show up as grayed-out on the menus, so that you can try to reassociate or delete them. It would be nice to have a similar way to work with Calendar!
Thanks for pointing me to the right article.

HT1386 I sync all songs, photos and videos between my computer and iPod classic with no problems, but when I get to sync info I get this message: "iTunes cannot sync Calendar and contacts to iPod. Try logging out of Windows adn then logging back in".

I sync all songs, photos and videos between my computer and iPod classic with no problems, but when I get to sync info I get this message: "iTunes cannot sync Calendar and contacts to iPod. Try logging out of Windows adn then logging back in". Could you please help?

Correct. When you update via iTunes all synced media that is not in your iTunes library will be lost.
As IO said before:
You can redownload most iTunes pruchases by:
Downloading past purchases from the App Store, iBookstore, and iTunes Store
I do not think it included audio books.

IPhone 4S IOS5 problems sync Calendar with Exchange 2003

One of my users is having problems sync Calendar with a brand new iPhone 4S running IOS5 and our Exchange 2003 Server. If an item is updated in Outlook it will not reflect it in the iPhone or viceversa. New items show up in both, only the updates in notes or changing some text in the subject or other elements in one side is not updated in the other side. Any help will be greatly appreciate.

Hi man, I got the same problem with my iPhone, but it has been solved..
First, You need the Outlook 2003 or 2007 only, if you have a earlier version of this it isn't work.
Second, You sould need to create a new PST file whit the Outlook Version 2003 or 2007, the file format must be on Unicode Format, no Outlook (97-2000) format, with this file format the import of calendar doesn't gonna be work.
Third, You now have a PST whit Outlook 2003 or 2007 Version, you need to manually put your events on the calendar, Why? Cause if you just move it on the new calendar it gonna create and old instance of the event not a new instance, That's why iTunes doesn´t sync the calendar.
I done all these and actually I can sync the calendar with my iphone.

Error while merging data problem while syncing calendars to iPhone

My iTunes just recently updated itself to iTunes 12, I'm using OS X Mavericks on a Macbook Pro, and have an iPhone 5S with iOS 8.1.1.
Whenever I try to sync my calendars from my laptop onto my phone, I get a message saying "iTunes cannot sync calendars to iPhone because an error occurred while merging data". I'm not sure if it's an issue with iTunes or my phone...but everything else syncs normally.
If anyone could help it would be greatly appreciated!!

hi there,
i've found a great & simple solution for this problem
just open your iCloud acc on iPhone
turn off calendars (it wil ask you to keep info or not - KEEP IT!)
and turn back on (MERGE!)
now SYNC it..
and that's it
PS in my case it was contacts so the procedure is the same..

Problem syncing calendars: "iPhone disconnected" error message

Everything seems to work as expected except for calendars. Every time I sync, the progress bar in iTunes hangs on "syncing calendars" and eventually I get an error message that says "iTunes could not sync calendars to iPhone because the iPhone disconnected". All other items sync fine. Any advice?
15" MBP Mac OS X (10.4.10)

I am having the same problem since last software upgrade for itunes and iphone. Apple phone support had me try the following: 1. delete all calendar events with neverending dates. Didn't fix problem. 2. Reinstall software upgrades. Didn't fix problem. 3. Restore iphone to factory settins and delete all old "corrupted" calendar imports from old Palm calendar. This seemed to work for a day. Then I tried syncing tonight and got same error message. Any body able to help?

Problem syncing calendars.

I have a problem syncing calendars. When I sync my iphone with my home desktop computer, events will transfer from the computer to the phone but not vice-versa. The calendars are in Outlook 2010 and the operating system is Windows 7. All updates in place. I have changed the settings in itunes for all calendars to sync. I have also lost bits of data in contacts such as phone numbers and addresses, or it is possible that duplicates were deleted that contain the additional info. I suspect this is a different issue. I would appreciate any help.
Thanks,
E.L. DuBose

Try;
System Preferences> Mobile Me> Sync>Advanced>Reset Sync Data and make sure the arrows go from your device/computer to the cloud
Message was edited by: Bobsax

Problems syncing calendar

On my Mac I have 4 calendars & only want to sync 2 of them. So in iTunes I selected 'Sync Calendars, Selected Calendars' then checked 2 of the calendars I wanted to sync (leaving the other 2 unchecked).
But it's added all the calendars to the iPhone.
So in iTunes I checked Calendar under 'Replace information on this iPhone' & synced again. I expected it to wipe the calendars on the iPhone & just add the 2 calendars I selected in iTunes, but it still has all my calendars on the iPhone.
How do I get rid of the unwanted calendars on there?

Try opening isync -> isync preferences in your applications folder. In the isync preferneces there is a button to reset sync history.
Then in ical create a new blank calendar. call it iphone or test.
Open itunes and info tab set the iphone to only sync the new blank calendar and to replace all calendar data on iphone.
this should clear out any events on the iphone.
Now try syncing one of your calendars back to the iphone.
If the calendar will not sync, try moving some of the events to the new test calendar created.
If the events moved to the new calendar sync fine, then there is an issue with that particular calendar.
Hope this helps

I get error message iTunes could not sync calendars to iPhone because an error occurred while merging data

I get error message iTunes could not sync calendars to iPhone because an error occurred while merging data on my wifes phone how do you correct problem without losing calendars info on phone.

One thing that might help.
1. open itunes preferences from the edit menu and click on the devices tab.
2. check the box to disable syncing for iphones connected to itunes and click ok.
3. Then click the button to reset sync history.
4. Now click ok to close the preferences window.
5. connect the iphone to itunes and go to the info tab.
6. scroll to the bottom of the info page and check the box to replace the ical data on the iphone.
7. then click apply on the bottom right of itunes.
This will overwrite any events on the iphone, including any events that has become corrupted.
Hope this helps

How to sync calendars and contacts between ios 3.1.3 and Mountain Lion?

I have a 1st generation iPod touch under iOS 3.1.3 and a MacBook Pro under Mountain Lion 10.8.3 with iTunes 11.0.1.
Since the upgrade to Mountain Lion syncing calendars and contacts between the iPod Touch and the Mac no longer works.
I don't want my personal information in Apple's or anybody else's Cloud and anyway iOS 3.1.3 can't use Apple's Cloud.
So I can no longer sync without a) replacing my iPod Touch which itself works perfectly well and does not need replacing and b) using Apple's Cloud which I do not wish to use for personal data.
This is a MAJOR AND DAMAGING step backwards by Apple, which they should correct IMMEDIATELY if they wish to keep their increasingly fed-up older customers.
Time-wasting work-around:
As I never trust operating system upgrades to not destroy something that "just works", I have Snow Leopard still on another bootable partition on my machine, and Lion on a bootable partition on an external Thunderbolt disc.
In order to sync, I backup Calendars and Contacts under Mountain Lion under which I do all my normal work, switch to either Snow Leopard or Lion, update iCal and Address Book from the backup files saved under Mountain Lion, sync the iPod Touch, and switch back to Mountain Lion.
Lots of time wasted with 2 successive re-boots, but at least HERE IS A SOLUTION THAT WORKS - I have seen lots of posts protesting bitterly about this totally unacceptable backwards step - what on earth do Apple hope to gain from this? More sales of newer equipment to replace perfectly functioning older ones? Certainly not from many of us.

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.
Feedback

Unable to sync calendar from iphone to itunes etc- message coming up

Hi,
Since I did an upgrade of itunes on my phone I keep getting this error when trying to sync with my phone and itunes
"iTunes could not sync calendars to the iphone "iphone" because the sync server failed to sync the iPhone."
Any advice on how I can sync would be helpful as it is difficult when things arent updated.
Thanks

I have the same problem.
After upgrading to latest iTunes I got an error saying "Itunes cannot run because some of it's required files are missing. Please reinstall iTunes". I fixed this by going into programs, found iTunes, right click and click repair (as detailed here: http://discussions.apple.com/thread.jspa?threadID=2775935&tstart=0 )
So now I have same problem, iTunes can not sync calendars to the iphone.
I only ever have problems like this after an upgrade. Very frustrating and time-wasting Apple!

I have DELETED calendars showing in my iTunes Sync Calendars list!?

iMac late 2009
OSx 10.10.2
iPhone 6 Plus
iOS 8.1.3
Completely Up to Date!
no clouds involved, no calendar subscriptions.
I have had a major problem with my Calendar's calendars, which I have completely repaired using Calendar. During that process, I had to rename a number of calendars in order to keep track of what I was doing - an intermediate diagnostic step. Once I'd gotten everything right, exported all the "good" calendars to .ics files, and deleted ALL CALENDARS - both the good ones and the intermediately named ones - then imported the .ics files back into Calendar... leaving me with ONE FULL SET OF CLEAN CALENDAR data. When I open Calendars on my mac, I see 33 calendars listed on the left side of the window.
My problem now that I'm ready to put my calendars back onto my phone, is that my Calendars Library (library/calendars) still has many of the intermediate calendar files (that have NOT been DELETED) and in iTunes, the list of Calendars includes all these same intermediate calendars, as well as the new calendars that I want to transfer to my phone. I would prefer to "select" "ALL CALENDARS" but I can't do that until I can remove the calendars that were supposed to be deleted/removed in the first place. In other words, I have 33 good, clean Calendars, but there are 71 Calendars in my Calendar Library.
What are the correct steps to remove the Library/Calendars folder so that the iTunes "Sync Calendars" list only shows the 33 good calendars, and not the 38 unwanted (deleted) calendars.
What do I have to do to finish the job?

I have/had the same problem. I tried deleting all the "Library" "Calendar" preference files I could find and like others nothing worked. Like others they would just recreate themselves.
BUT, I did find the solution. Not sure which part worked, but this is what I did.
I quit all the apps, Calendar, and iTunes.
I went into the folder pointed to by job-seeker above:
               <user>
               Library
               Containers
               com.aple.CalendarAgent
               Data
               Library
               Calendars
Manually went through each cached calendar folder and looked in the info.plist for the calendar title listed below "<key>Title</key>" and deleted the parent folders of no longer existent calendars.
Then find an app called "Reminders", open it and you will find all the deleted calendars that you have deleted over the years, they seem to get cached in it, delete them and quit.
Relaunch iTunes and find the deleted calendars in question are gone.
I think you could skip all the above and just try deleting the old calendars from this Reminder app and it may work, but the above is what I did when it worked for me and I do not want to recreate the problem just to verify my theory. ;-)
Hope this helps,
Michael

ITunes says it can't sync calendar b/c calendar on iPod is in use.

Hi all. I'm stumped. I just got a new iPod Touch. I was able to sync my contacts (and everything else) through iTunes on my MacBook, but I got an error message about the calendar: "iTunes could not sync calendars to the iPod 'iPod Touch' because the calendars are in use by the iPod. Close the calendars setting on the iPod and try again." The problem is, I don't have the calendar open on the iPod, and don't see where I could close it in any case.
Then, I thought I would just enter things manually onto the calendar, but I can't do that either, as there's no + sign and no way to enter/add anything.
I've googled around about this and seen people saying to turn on the calendar in iCloud. But when I do that, it just crashes. It says it's starting to merge and then crashes, sometimes instantly, sometimes after a minute. I can't use iCloud for now anyway because my MacBook is running Snow Leopard, and I'm not planning to upgrade to Lion until I get a new computer.
I've been syncing my first generation iPod Touch to my MacBook for almost 4 years now with no difficulties. And, as I said, the contacts and everything else worked fine. It's just the calendar, which I really need to be able to update. I tried to sync it with my Outlook calendar at work, just to see what would happen, and I got the same error message.
Ideally, I'd like a fix that will allow me to sync it with either iCal on my MacBook or with my Outlook calendar on my work computer. In any case, I need to be able to update it manually but don't know how to get the + sign back.
Any assistance would be appreciated!
Thanks,
Sue

You will need to Restore the device...
Connect to iTunes on the computer you usually Sync with and Restore...
http://support.apple.com/kb/HT1414
If necessary Place the Device into Recovery mode...
http://support.apple.com/kb/HT1808
You may need to try this more than once...

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I tried to sync Contacts of my Google account into the address book. I follow the steps after clicking the preferences in Address book and type the google account and password info correctly. I hit the circle icon on the top right menu bar and pull down to select Sync Now. But nothing appears on the Address book while I could trial sync the contacts to an empty google account. It seems it is not a synchonization but one-way data transfer. I read some thread in this community and most of people find this similiar problem.
Apple Support, what could we do?????????

On October 18, 2007—with less than 24 hours notice for most users—Apple announced that .Mac synchronization services would change substantially to accommodate Panther users. Here is the text of that notice, which many users apparently did not receive:
"Dear .Mac member:
Due to improvements being made to .Mac Sync on October 19, 2007, please note the following changes.
Mac OS X version 10.4 Tiger users:
To ensure uninterrupted service, you must be using Mac OS X version 10.4.10. To check which version you’re running, select About This Mac in the Apple menu. If you are not running version 10.4.10, click the Software Update button and install the update to 10.4.10.
Mac OS X version 10.3 Panther users:
To accommodate new enhancements, .Mac Sync will no longer support syncing of calendars between a Panther-based Mac and a Mac running Tiger or Leopard. Syncing calendars between Mac computers running Panther is unaffected.
These changes will help enable .Mac Sync to do more than ever. Thank you for your patience, and thank you for being a .Mac member.
That was ten days ago, and .Mac synchronization services are still undergoing 'maintenance.' There is not announced date by which stable, familiar service will be restored.
You can check the main page of .Mac to determine when the amber LED labeled Sync returns to green, or survey the this forum for information about service restoration. You'll see a previously updated status note at the top of the forum change when service is restored.

Upgraded to Mavericks. Calendar.app asks for password to sync calendar to Exchange account. Exchange server rejects password.

Upgraded to Mavericks. Calendar.app asks for password to sync calendar to Exchange account. Exchange server rejects password. Had to go to Outlook (ugh!) in order to work (this suck!). Please help!

Wanted to chime in and say I'm having the same problem. Had to go back to Outlook which feels ancient. Hope Apple fixes this soon.

Sync calendar problem

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