http://tidbits.com/ Apple Mail on both Mac OS X and iOS can tell you immediately when you have new mail, but the two versions do so using very different systems. Michael Cohen explains how each works. en-us Copyright 2012 TidBITS Publishing Inc. Sat, 27 Oct 2012 00:00:00 EDT Sat, 27 Oct 2012 00:00:00 EDT editors@tidbits.com (TidBITS Editors) editors@tidbits.com (TidBITS Editors) http://tidbits.com/images/tb_logo_152x55.png http://tidbits.com/ 55 152 TidBITS badge http://db.tidbits.com/article/13344?rss#comments_16341 Sat, 27 Oct 2012 01:17:48 EDT http://tidbits.com/article/13344#comments_16341 http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/ApplePushService/ApplePushService.html#//apple_ref/doc/uid/TP40008194-CH100-SW9

I would think email providers could push this information as well...]]> http://db.tidbits.com/article/13344?rss#comments_16248 Mon, 22 Oct 2012 23:18:15 EDT http://tidbits.com/article/13344#comments_16248 http://db.tidbits.com/article/13344?rss#comments_16243 Mon, 22 Oct 2012 19:56:49 EDT http://tidbits.com/article/13344#comments_16243
http://support.apple.com/kb/HT3947?viewlocale=en_US&locale=en_US

However, CardDAV/CalDAV is APNS on both iOS and OSX.]]>