The built-in Reminders app on your MacBook is another option for setting an alarm. You can set reminder alarms to go off at specific times and specific locations.
You could set an alarm reminder to begin writing that goes off when you get to your favorite coffee shop, for example. Reminder sounds aren't as loud or continuous as Calendar alarms, however, so they are not recommended for use as a wake-up alarm.
Set a reminder alarm by opening the Reminders app. To do this, click the "Magnifying Glass" in the top right corner of your Mac, type in "Reminders" and click the "Return" key. Click the "+" button in the Reminders app and type in a name for your reminder.
Click the "i" icon next to the reminder and check the box next to "On a Day." Select the day and time for the reminder and click "Done" to save it.