Apple Event: May 7th at 7 am PT
With macOS Catalina 1.15.2 reminders do not sync with Synology Caldav server. iOS 13 does, but Catalina won't. Calendar sync with that server is working though on all devices with iOS or Catalina.
Looking into the logs of Catalina I noticed that remindd gets a 405 HTTP Error response at regular intervals. I guess this is generated by the Synology server.
iMac 27", macOS 10.15
I don't think the linked thread fully explains the problem @tallinn1960 is seeing. I am experiencing the same problem.
CalDAV sync iOS 13.3 <- -> Synology NAS: works
CalDAV sync macOS 10.15.2 <- -> Synology NAS: broken
Discussion 250658735 is about the discrepancy between migrating an iCloud based reminders database to the new format and the timing problem Apple introduced by not releasing iOS 13 and macOS 10.15 simultaneously, leaving users with broken setups and no proper warning dialogs before initiating the breakage. Apple also does not clearly communicate that the new reminders features are limited to the new database format and that new database format is limited to iCloud databases.
I migrated to iOS 13 and was excited about subitems (the most basic feature for any Todo-Software) being introduced to the reminders app. I was never asked to upgrade the database and I never found out how to use subitems. I assume that is because I am not using iCloud and it seems CalDAV users with non-iCloud databases are not migrated. That is acutally a good thing because that way I can continue to user reminders.
Or so I thought. Upgraded to macOS 10.15.2 and discovered Apple deliberately or by accident broke CalDAV sync for reminders - even in the old database format.
Apple has created quite the mess. I sincerely hope they can clean this up sooner than later. Engineering is aware of this problem. I hope they don't ignore it for months to come.
I don't think the linked thread fully explains the problem @tallinn1960 is seeing. I am experiencing the same problem.
CalDAV sync iOS 13.3 <- -> Synology NAS: works
CalDAV sync macOS 10.15.2 <- -> Synology NAS: broken
Discussion 250658735 is about the discrepancy between migrating an iCloud based reminders database to the new format and the timing problem Apple introduced by not releasing iOS 13 and macOS 10.15 simultaneously, leaving users with broken setups and no proper warning dialogs before initiating the breakage. Apple also does not clearly communicate that the new reminders features are limited to the new database format and that new database format is limited to iCloud databases.
I migrated to iOS 13 and was excited about subitems (the most basic feature for any Todo-Software) being introduced to the reminders app. I was never asked to upgrade the database and I never found out how to use subitems. I assume that is because I am not using iCloud and it seems CalDAV users with non-iCloud databases are not migrated. That is acutally a good thing because that way I can continue to user reminders.
Or so I thought. Upgraded to macOS 10.15.2 and discovered Apple deliberately or by accident broke CalDAV sync for reminders - even in the old database format.
Apple has created quite the mess. I sincerely hope they can clean this up sooner than later. Engineering is aware of this problem. I hope they don't ignore it for months to come.
So Nextcloud 17 did the trick. One need 17 as older versions do not have reminders integrated into the calendar service. One need an official TLS-certificate for the Nextcloud-Server to make iOS happy. Other than that the same caldav-url used for the Nextcloud-Server-Calendar will also sync reminders with both Catalina and iOS.
"...CalDAV sync iOS 13.3 <- -> Synology NAS: works..."
So did you hit the Upgrade button in Reminders to convert to the new format? If not then you may be right, but the Mac Catalina cannot then process the old style reminders.
I have no idea if the move was deliberate or accidental but it happened.
The changes introduced to the reminders app with Catalina and iOS/iOSPad 13 affect (or at least are supposed to affect) iCloud-Reminders only.
But I am not yet convinced that the reminders app on Catalina is broken as I found (on the internet) that reminders hosted by nextcloud systems sync with Catalina (at least for some people). I will look into that on my own as nextcloud can run on my Synology disc station.
Got an Apple Watch just yesterday. Which happily showed me the reminders stored on my disc station like my iPhone and iPad do. Not sure wether that counts as CalDav-compability or the watch pulling the data from my iPhone.
Nothing in Catalina is broken, just different. If you want mac and phone to sync reminders they need to be the same format. ie
ios13 non upgraded reminders with Mojave or
ios13 upgraded reminders with Catalina
icloud is the normal way to sync but apple watches without cellular are different.
CalDav incompatibility affects non-Apple infrastructure such as in the original post.
Here is a blog from a third party company who will have worked with Apple in preparing for iOS13/Catalina reminders. They seem to think support has been dropped, not that they mis-coded it in error.
Either way the new format is here to stay IMO
To follow up:
I tested Catalina reminders with a Nextcloud server and those reminders do sync with this server using caldav. I can see them appearing on the server.
After all it would be a bug to offer the setup of CalDav-accounts on Catalina for both Calendar and Reminders and than not to support the CalDav-Reminders.
The weird thing is that now iOS won't play with Nextcloud. According to the internet wisdom this is caused by my Nextcloud server not having a sound TLS certificate. iOS reminders seems to be more picky about the certificate than iOS calendar and Catalina calendar and reminders are.
So the resolution to my particular problem may be to drop the Synology Calendar Server and replace it with a Nextcloud server (it is possible to install Nextcloud on Synology). The Synology Disc Station has a LE TLS certificate and so everything should be nice with both iOS and Catalina.
@tallinn1960 Thanks for testing this out and nice you found a solution.
Can someone explain why CalDAV sync in Apple macOS reminders.app would work with NextCloud 17 but not with Synology Calendar Server?
Starting with iOS 13 (if you hit the upgrade button) and macOS Catalina, the new Reminders app no longer supports CalDAV.
https://discussions.apple.com/thread/250658735
etc
Most people did it by mistake before Catalina was ready and were in a similar situation to tallinn 1960 because Mojave cannot read new type reminders
It is their prerogative but if you want it back put in a feature request
https://www.apple.com/feedback/
Never was presented an update option in iOS reminders. So did not hit upgrade button.
I would politely disagree here. CalDAV sync for reminders in Catalina is indeed broken. The question is did Apple kill it deliberately or by accident. Hard to tell nowadays.
Yup, killed deliberately.
If the new format is here to stay, it's time for Apple to make it work with CalDAV or WebDAV. Not being ready at the time of the Catalina release is not great.
macOS Catalina reminders do not sync with Synology caldav server
