Apple MacBook Air (Late 2008), (Mid 2009) - Manual (Page 21)

Chapter 1 Ready, Set Up, Go 21
2 On the Windows computer, open the DVD or CD Sharing control panel.
3 Select “Enable DVD or CD Sharing.” If you want other users to request permission to
share a DVD or CD, select “Ask me before allowing others to use my DVD drive.”
To use a shared DVD or CD:
1 On the other computer, insert a DVD or CD into the optical disc drive.
2 On your MacBook Air, select the Remote Disc when it appears under Devices in the
Finder sidebar. If you see the “Ask to use” button, click it.
3 On the other computer, when prompted, click Accept to allow your MacBook Air to use
the DVD or CD.
4 On your MacBook Air, use the disc as you normally would once it becomes available.
If you try to shut down the other computer or eject the shared DVD or CD while your
MacBook Air is using it, you’ll see a message telling you that the disc is in use. To
proceed, click Continue.