Where is the eject button on an imac?

On an iMac, there isn't a dedicated physical eject button like on some other devices. Instead, you can eject a disc by clicking the Finder icon, selecting the disc from the sidebar, and then clicking the eject icon next to it. Alternatively, you can press Command (⌘) + E on your keyboard to eject the selected disc. If you have a keyboard with an eject key, it may also serve this purpose.