Updating boot support partition
If you're a huge Apple fan, but you're tempted to give Windows 10 a spin and see how it feels, now you can.
What happens if you click on the name "Untitled" (on the HD icon on the desktop)…and change it? I’ve changed the setting but it made no difference. If I click on the volume in Devices I just get a blank Finder window.
(Apple provides a helpful list for that.) Assuming it does, you'll want to boot into OS X and make sure that you have any and all software updates installed.