To do this, open up a Finder window and click 'Macintosh HD.' Then click 'System,' followed by 'Library,' 'CoreServices,' 'Menu Extras' and, lastly, 'nu.' An eject icon will now appear at the top right of your screen. One is to permanently install an eject icon in the toolbar menu situated at the top of your desktop. Thankfully, there are a number of work-arounds. Of course, this presents a problem for users who don't use an Apple-issued keyboard or one of the few third-party keyboards with an eject button, for whom there is simply no obvious way to open an empty drive. One element that was sacrificed by Apple's designers on the altar of minimalism: the eject button.
Like many Apple products, the monolithic Mac Pro tower (along with some of its predecessors) was designed with as few physical buttons as possible.
