My Macs developed a glitch where I can't select the Mac HD when doing a 'save as' from InDesign, Illustrator etc. To be able to select the HD I first have to click another option like 'desk top' or an attached 'external HD'. Then after clicking on the desk top or external HD I can click on the Mac HD and it will respond and I can save to it. It's an annoying problem which I haven't come across before. I have run DiskWorrior and iDefrag and neither have fixed the glitch. Any help would be much appreciated. Thanks you.