Use App Limits settings in Screen Time to set time limits for apps and websites.
To change these settings on your Mac, choose Apple menu > System Settings, then click Screen Time in the sidebar. (You may need to scroll down.) Click the Family Member pop-up menu on the right and choose a family member (if you’re a parent/guardian in a Family Sharing group), then click App Limits.
View the status of app limits, turn app limits on or off, and view the list of current limits.
If you turn off app limits, any limits you set up are saved, but they aren’t applied until you turn app limits back on.
Create new time limits for apps, categories, or websites.
Click Add Limit, then do any of the following in the “Create a new app limit” list:
See the list of apps in a category: Click the arrow next to the category.
Limit an individual app: Type the name of an app in the search field, then select the checkbox next to the app in the list.
Limit all apps in a category: Select the checkbox next to a category in the list.
Limit all apps and categories: Select the checkbox next to the category All Apps & Categories in the list.
Limit a website: Click the arrow next to the category Websites at the bottom of the list, click the Add Website button , then type the URL for the website.
Set the time limit:
Use the same time limit each day: Select Every Day, then enter an amount of time.
Use a different time limit each day: Select Custom, click Edit, then enter an amount of time for each day of the week.
Change the amount of time allowed for a limit, change the apps and categories that the limit applies to, and remove a limit.
Change a time limit: Move the pointer over a limit in the list, click Edit, change the time limit, then click Done.
Change the apps and categories included in a limit: Move the pointer over a limit in the list, click Edit, then click Edit Apps. Select or deselect checkboxes next to apps and categories. Click the arrow next to a category to reveal the apps in the category. Click Done when you’re finished.
Remove a limit: Move the pointer over a limit in the list, click Edit, click Remove Limit, then click Remove Limit.