Add, change, or delete reminder lists on Mac
Create separate lists to organize all your to-do items into categories, like home maintenance, vacation planning, movies you want to see, or even grocery shopping.
Add a reminder list
In the Reminders app
on your Mac, click the Add List button 
on the left, then choose an account, if you have more than one set up.Enter a name for your new reminder list, then press Return.
Change a reminder list name or color
In the Reminders app
on your Mac, choose View > Show Sidebar.Do any of the following:
Change the list name: Select the reminder list, click its name in the sidebar, then enter a new name.
Change the list color: Control-click the reminder list in the sidebar, then select a colored circle.
The color is used for the list title and the circle that shows a reminder is complete
.
If you want to change participants in a shared list, see Share a reminder list.
Delete a reminder list
In the Reminders app
on your Mac, choose View > Show Sidebar.Select the list in the sidebar, then press Delete.
You can also swipe left, then click Delete, or swipe all the way to the left until the reminder list disappears.
You can’t delete the Scheduled list. If you use Family Sharing, you can’t delete the Family list. See Set up Family Sharing.
Set the default reminder list
You can specify a default reminder list, which is where reminders that are added by other apps appear. For example, if you add a reminder using the Reminders calendar, the reminder appears in your default reminder list. If you decline a FaceTime call and remind yourself to call back later, that reminder also appears in your default reminder list.
If you don’t set a default list, these reminders appear in the list named Reminders.
In the Reminders app
on your Mac, choose Reminders > Default List, then choose a list.