sogo: macOS vs iOS

calendar/sogo_client_config.markdown

@@ -28,7 +28,12 @@ go to `Control Panel` -> `Mail (Microsoft Outlook)` -> `E-Mail Accounts...` -> `
 
 ### Add Sogo in Apple Calendar
 
-Open `Preferences` -> `Accounts` and click the plus (`+`) to add a new account. Select `Other CalDAV Account` from the options then
+Add a new CalDAV account, depending on your operating system:
+
+  * On macOS: open `System Settings` -> `Internet Accounts`
+  * On iOS: open `Preferences` -> `Calendar` -> `Accounts`
+
+Click `Add Account` -> `Other` -> `CalDAV Account` and enter the following information:
 
 | Key            | Value                       |
 | -------------- | --------------------------- |