Mail constantly synchronising (iCloud imap - Mavericks)

I see a similar situation as well everytime I open Mail.

It will spend a lot of time syncing/copying my iCloud

account mailboxes, even if nothing has changed with

them. I do sync iCloud mail with my iPhone and my

Macbook Pro. However, this behavior was not present

in Mountain Lion and only mailbox changes were updated

on the different devices.

It is happening with other IMAP accounts. I have been having sync issues with my usa.net account via IMAP.

I realized about this problem after finding an old email and then seeing it "disappearing" right away. Then, all of the folders, including Inbox, become empty. I have seen this event three or four times, and I have rebuilt the account every time.

I did not have this issue with ML, Lion or SL.

I just reported this issue to Apple.

I have this, too. Affects only the iCloud (.Mac) mail and only using Mail. Does not affect other IMAP accounts with a different ISP, does not affect iOS devices, does not happen with a different mail program (Postbox). Can be seen clearly using the Mail activity monitor window.

I thought I'd fixed it by removing "Envelope *" files and some others, but the faulty behaviour returned. Rebuilding mailboxes makes no difference.

IMO (or judgement) this is clearly related to the upgrade to Mavericks associated with Apple's Mail application and Apple's iCloud.

Thanks for the details about which configurations show the problem. This is even more weird than I expected, does it mean that noone at Apple uses Mail with an iCloud account? I thought that Mavericks had been in development long enough for somebody to be aware of this...

I'm not having this issue. However, I also have an iPad that syncs using IMAP (an iCloud acct), and that seems to stop the issue.

In the past large IMAP MBs have ALWAYS caused prblems. It's the main reason I don't us it for business. Having said that do any of you with problems have the IDLE command checked?

I don't know if that will help, but I'm sure that I turned this on AFTER moving to Mavericks.

Thanks for the tip, you made me hope for a quick fix. Unfortunately it was already checked, and it keeps syncing.

bummer

Wouldn't have helped in my case. I'm seeing this problem with POP3 email that's stored in iCloud mailboxes. No IDLE tickbox offered for POP accounts, as far as I can see.

The "idle" box is also checked for me... No effect on the problem !

My Mail is also syncing much more often than I used to see it perform it's regular tasks at the set interval. But the most remarkable thing is that it is "syncing" off-line folders as well ! I repeatedly notice it dabbling with my year-to-year "Archief" folders which are supposed to be stored merely off-line ("On my Mac"). But I see these names whirling by with an "iCloud" suffix, every time Mail starts syncing. What's happening here ?

Further...

Have by chance just bought a new MacBookPro which arrived with Mavericks installed. Mail on this brand new MBP displays exactly the same re-syncing behaviour as on my venerable MacPro. So, nothing to do with the computer. Must be the OS.

Yes ... this is annoying, in previous post I thought it had to do with other device synced to a specific mac and iCloud but that was a wrong assumption. This syncing is a 10.9 / Mail problem and very bad.

The strange thing is that so few user have seen this, maybe activity monitor window is not used to see what Mail is doing. It takes a few minutes for the sync process to end and then when finally done - lo and behold - sync starts again. Funny but not funny. This should not have been released.

I'm also having this problem, and mail seems to want to sync all the mail folders (which I use fairly heavily) on iCloud. Unfortunately, I upgraded both my laptop and desktop to Mavericks, and this is happening on both (MBP late 2012 and iMac mid-2010). I am beyond frustrated.

One of the previous posters mentioning "reporting this to Apple". How might one go about doing that? I do not have current support.

Hi Farnaz,

I sent à feed-back to Apple using this web site : http://www.apple.com/feedback/macosx.html

Apple just issued an update for the Mail app,

and it seems to be all right now ! Haven't seen

the sequence of activities for many minutes. !

Just run the Software Update...

🙂