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Inside OS X 10.8 Mountain Lion GM: Calendar & Reminders offer smart search, location-based alerts

iOS-style Reminders

Mountain Lion is spinning off Reminders as its own app, just as iOS did last year. One advantage of this is that when you have Siri create a reminder for you from your iPhone 4S, it will now show up in Reminders just like on your other iOS devices, rather than being synced into a hidden reminders sidebar of the old iCal. Apple's upcoming Reminders web app will perpetuate this consistent user interface to the iCloud webpage as well.

Additionally, having a separate Reminders app as disconnects the concept of a reminder with a calendar date: you can now have reminders that fire purely when you enter or leave a location. "Geofencing," which can trigger a reminder event when you enter or leave a specific location, requires a WiFi network connection, as the system obviously has to know where you are at for this to work.

Before Reminders turns on location tracking on your Mac, it requests you to approve this under the Privacy pane of System Preferences. You must supply administrator credentials to unlock the ability to turn enable Location Services, and to allow specific apps to tap into the to feature.

Once approved, you can add "remind me: at a location" to a new entry in Reminders. As you type an address or contact name, the system offers suggestions of locations in your contacts or completion suggestions for the address you are typing. You can select to be reminded while departing or arriving at the listed location.

You can also combine location and time alerts, so you will be given a reminder either when you cross the geofence or at a specific time.

In addition to location-based reminders, the new spinoff of the Reminders app also gives you one place for checklists of events, whether they are connected to a specific due date, ongoing tasks, or have already been completed. In Reminders, you can click on a specific day to see just the reminders for that day, or you can view events grouped by account, by an arbitrary listing name, or see the list of reminders you've already completed.

Reminders doesn't yet support complex task management, such as plotting out who in a team is responsible for completing a particular task, or relationships between tasks that are dependent upon the completion of other events. Apple's system level integration of Calendar and Reminders does allow third parties to tap into calendar data to provide more sophisticated task management alternatives, however.