Share a reminder list on Mac
Share the load — collaborate on an iCloud reminder list with other people to get things done faster.
You can share reminder lists in your updated iCloud reminders account with other iCloud users who’ve also updated their reminders. Everyone who shares the list can create and edit reminders from any computer or device set up with iCloud. Notifications aren’t shared; you can set a reminder to remind you at a time or place, but it won’t remind anyone else.
By default, when you share a list, anyone you share the list with can share it with additional people. To learn how to control who can share the list, see Change who can share the list with others.
After you start sharing a reminder list, you can add or remove people, or stop sharing the list with anyone.
You can also assign reminders to people who share the list.
Note: All Reminders features described in this guide are available when using updated iCloud reminders. Some features aren’t available when using accounts from other providers.
Share a list
In the Reminders app
on your Mac, select a reminder list in the sidebar, then click the Share button 
.The Share button appears only when the pointer is over the list or after the list is shared.
If you don’t want to allow people you add to the list to share it with others, click the arrow
next to “People you invite can add others”, then unselect “Allow others to invite”.Choose how you’d like to share your list:
Share the list using Mail: Click Mail, enter the email address for each person you want to share the list with, then click Send.
Share the list using Messages: Click Messages, then in the To field, enter the name, email address or phone number for each person you want to share the list with. Press Return to send the message. See Collaborate on projects with Messages.
Share the list using Notes: Click Notes, enter the name, email address or phone number for each person you want to share the list with, click Share Link, then click Save.
The invitee must accept the invitation in order to view and edit the shared list.
Add people to a shared list
After you start sharing a reminder list, you can add more people who can see the list.
In the Reminders app
on your Mac, select a shared reminder list in the sidebar, then click the Share button .In the Participants list, click Share with More People.
Choose a method to share the list, then enter the contact information for each person you want to share the list with.
Manage notifications from shared lists
In the Reminders app
on your Mac, select a reminder list in the sidebar, then click the Share button .In the Participants window, go to Notify When, then select or unselect the following settings:
Adding Reminders: Select this tick box to send notifications when reminders are added to the list. Unselect this tick box to stop these notifications.
Completing Reminders: Select this tick box to send notifications when reminders are completed. Unselect this tick box to stop these notifications.
Click Done.
Change who can share the list with others
In the Reminders app
on your Mac, select a reminder list in the sidebar, then click the Share button .In the Participants window, do any of the following:
Allow everybody or nobody to add other people: Select or unselect the “Anyone can add more people” tick box. This setting applies to everyone on the list except the owner.
Allow specific individuals to add other people: Move the pointer over a person in the list, click the More button
that appears, then choose Allow to Add Other People so that a tick mark appears next to the option.Don’t allow specific individuals to add other people: Move the pointer over a person in the list, click the More button
that appears, then choose Allow to Add Other People so that the tick mark disappears.
Click Done.
Remove people from a shared list
If you no longer want to share a list with a person, you can remove them from the shared list.
In the Reminders app
on your Mac, select a reminder list in the sidebar, then click the Share button .In the Participants window, move the pointer over the name of the person you want to remove, click the More button
that appears, then choose Remove Access.Click Done.
When you remove a person from the shared list, the list is removed from all of the other person’s devices.
Stop sharing a list
If you change your mind about sharing a list or no longer need to share it, you can stop sharing it with everyone.
In the Reminders app
on your Mac, select a reminder list in the sidebar, then click the Share button .In the Participants window, click Stop Sharing, then click Continue.
When you stop sharing a list, the list is removed from all participants’ devices.