Follow these steps for each computer whose screen you want to share.
- Choose Apple menu > System Preferences, then click Sharing.
- Select Screen Sharing.
If Remote Management is selected, you must deselect it before you can select Screen Sharing.
- Next to “Allow access for,” choose all users, or only listed users. If you permit only listed users to have access to the screen, click Add (+) and Remove (-) to edit the list.
- In System Preferences, click Show All, then open iCloud preferences.
- If you aren’t already signed in to iCloud, enter the Apple ID you use with iCloud, then click Sign In.
- Select Back to My Mac.
To stop sharing your screen using Back to My Mac, open iCloud preferences, then deselect Back to My Mac.