OS X Mountain Lion: Share your screen
You can let others view your screen and control your computer. While your screen is shared with another computer, a user of the other computer sees what’s on your screen and can open, move, and close files and windows, open applications, and even restart the computer.
- Open Sharing preferences if it isn’t already open, and then select the Screen Sharing checkbox.
- To specify who can share your screen, select one of the following:
Option Description All users: Anyone with a user account on your computer can share your screen. Only these users: Screen sharing is restricted to specific users.
- If you selected “Only these users,” click Add (+) at the bottom of the Users list, and do one of the following:
Select a user from Users & Groups, which includes all the users of your Mac.
Select a user from Network Users or Network Groups, which includes everyone on your network.
Select a person from your contacts. Create a password for the person, and then click Create Account.
Click New Person. Enter a name and password for the person, click Create Account, and then select the person from Users & Groups.
- To let others share your screen without having a user account on your Mac, click Computer Settings, and then select one or both of the following:
Option Description Anyone may request permission to control screen: When other computer users begin screen sharing sessions with your Mac, they can ask for permission instead of entering a user name and password. VNC viewers may control screen with password: Other users can share your screen using a VNC viewer app, for example on iPad or a Windows PC, by entering the password you specify here.
If this computer’s screen is shared only by other OS X users, turn off these options and add accounts for the other users.