You can check target Mac computers for the software updates that they require. When you run the Check Available Updates Task, the target Mac computers download software update information from Apple and then report the list of available updates to Notification Server.
To ensure that the list of available software updates on Notification Server is kept up-to-date, schedule the task to run twice a week. Configure the task to run on the All Patchable Mac Computers target.
To check for available software updates