A value of type
Time, which specifies a range of time during which the background activity may occur.
- macOS 10.10+
A nominal fire date for scheduled background activity is calculated based on a combination of the
interval property value and the time the activity began or the last execution date. The
tolerance property specifies a grace period—a range of time before and after the nominal fire date, during which the activity may be invoked. As the activity nears the end of its grace period, the system schedules the activity more aggressively. The default tolerance period is half the value of the
interval property. See Configure Scheduler Properties.