Use any of the following methods to eject a CD or DVD when you’re using Windows on your Mac.
Press and hold the Media Eject key ⏏ at the top of your Apple keyboard (on Mac computers with a DVD drive) until the eject symbol appears onscreen.
Right-click the disc icon in Windows Explorer (Windows 7) or File Explorer (Windows 8 or later), then choose Eject.
Select the disc icon in Windows Explorer, then click Eject.
As your Mac is starting up, hold down the primary mouse or trackpad button until the disc is ejected.
To open or close the second optical drive of a Mac Pro computer, press Option-Eject.
You can’t eject a disc when the Windows Welcome Screen is displayed. Log in to a user account, then try again.
If the Media Eject key doesn’t work, make sure you installed the Boot Camp drivers. The function keys on Apple keyboards work in Windows only after you install the latest Windows support software. For information about installing the Windows support software, see the Apple Support article If some Mac features don‘t work when running Windows in Boot Camp.