Reminders do not syncronize

I've always noticed that issue too. Have no idea why it does that. I would use it more often if it worked properly.

 

same issue here. On top of it i see the damn missed reminder not on my mac with a"1" which does not go away

 

This has been a constant annoyance/problem for a LONG time. Seems like someone at Apple would get tired of completing/checking off a Reminder on their iPhone just to find out on their Mac and do something about it.

 

Same here for a long time. Freaking annoying.

 

Besides Reminders I use it for grocery list. Get to the store and know items are missing. Have to add and delete faux items to 'force' it to sync. Very annoying.

 

It usually works faster when going from iOS to macOS rather than the other way around.

 

I only use Reminders on one iDevice (my phone), because they don't sync well.

If you do have them synched, and add a reminder on one device, it won't even show up on the other device until you launch the Reminders app – which defeats the purpose (as you won't get the alert on that device unless you remember to open the app first).