Do you have the Path item in your toolbar? Open something else, say your home folder, then click on the Path tool and see if everything is there, but the MacHD icon appears "greyed" out in comparison. If you don't have the Path tool, just open a Finder window, any window will do, go to the menu bar View item, select Customize Toolbar and add the Path. If the MacHD icon is greyed out in Path list, then you are a victim of the Invisibility Plague. See this article for the cure:
http://www.pinkmutant.com/articles/invisible.html
The Applescript I wrote is the easiest fix.
Francine
Francine
Schwieder