Here’s a list of common ways to eject a disk from a Mac. This disk could be a CD, a DVD, a USB flash drive or an external hard drive.

• Some Apple keyboards have an eject key. It is commonly located in the upper right corner of the keyboard. Press the eject key to eject the disk. If your keyboard doesn’t have an eject key but it does have an F12 key, hold that key for a few seconds, instead.
• Locate the desktop icon for your disk. Then click on and drag that icon towards the Trash icon on the Dock. You’ll notice that the Trash icon changes to an Eject symbol, drop the disk’s icon onto this Eject symbol. Alternatively, don’t drag the icon at all. Instead, hold down the Control key and click on the desktop icon, select Eject from the menu that appears.
• Click on the Finder icon on the Dock to open a Finder window. On the left-side of the Finder window click the eject icon that appears to the right of disk’s name.
• Some applications, such as iTunes and Disk Utility, have an eject command in a menu or toolbar. Launch the application and use the eject command to eject the disk.
• If none of these methods work, restart your Mac. If you want to disconnect a USB flash or an external drive, simply do so during the first few seconds after the restart. If you’re trying to eject a CD or DVD then hold down the Mouse button. Continue to hold it until the disk is ejected.