An event schedule will run an action when a particular event occurs. Mounting a volume or quitting an application are examples of events that can start an action running. There are eight event schedules to choose from:
The Capture Item Changes event requires that the item's volume support macOS's filesystem change event service. This event may not work on items contained on remote volumes, devices formatted for Windows, and so on.
Also, you should not use this event to capture items which change frequently, like your home folder. You home folder contains your account cache and preferences files, which change all the time, causing the action to run incessantly. For large folders or volumes that change regularly, use a time schedule.
Finally the number of folders that can be monitored for changes is limited by macOS. So keep the total number of capture items being monitored for changes (in all actions) to a reasonable number, certainly less than a dozen.
The action can wait for a short period of time, following the event, before starting.
Enter a value of 0
to run the action without any delay.
The ignore option will ignore similar events that occur after the event that ran the action. To prevent new events from running the action again too quickly, choose the Ignore new events for option and choose a time period. The next event that occurs after the ignore period will run the action again.
For example, the Capture item volume connects schedule can capture a portable drive the minute it is plugged in. If you set the Ignore new events for period to 1 hour, the action won't run again if the drive is disconnected and then reconnected 10 minutes later. If it's disconnected and reconnected three hours later, the action runs again.
If a repeat interval is set, the action will repeat again at regular intervals as long as the condition that caused the event persists.
For example, take an Archive Volume Connects schedule that is set to repeat at 6 hour intervals. The action runs when the volume containing the archive is connected. If that volume remains connected for 6 hours, the action will run again, and will continue to run every 6 hours until the volume is ejected.