Is it possible to manually sync reminders with iCloud whenever you want?

Solution 1:

Yes, but only by revealing the Debug menu in Reminders. To do this:

  1. Launch the Terminal app (usually found in the Applications > Utilities folder)
  2. Enter the following command (or just copy and paste it):

    defaults write com.apple.reminders RemindersDebugMenu -boolean true
    
  3. Press Return

  4. Now launch your Reminders app (or, if it was already open, quit it and launch it again)

Now you can go to Debug > Refresh (or just press command + R) to refresh your Reminders with iCloud.

NOTES:

  • If the above process doesn’t reveal the Debug menu, then quit the Reminders app and start again at Step 2.
  • If you ever want to hide the Debug menu, then follow the same process but at Step 2 enter the following command instead:

    defaults delete com.apple.reminders RemindersDebugMenu