I just got my iMac, coming from Ubuntu. and just finished making it a single partition, Mac OS Extended (Journaled). I forgot to give it a name so now it shows as Untitled. I right clicked on it in Finder/Get Info, and changed the name there, but got error code 8065. I tried doing it via the desktop icon but got the same result. I have no idea what that means. Can anyone tell me what's going on here and what I need to do?