[DM-MUG] Q ref MacBook Air and terminal message on screen

[Victoria L. Herring]

...I ended up shutting it down by holding down the power button
and then restarted, moved DW from the disk to my Air and then ejected
DW disk and unhooked the external drive and then moved the DW icon to
the Air SuperDuper partition and started up from that, ran DW just
fine and just finished installing SL...thanks much
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Victoria L. Herring, Des Moines, Iowa. Blogs: 
http://blog.JourneyZing.com  [photography]; 
http://www.herringlaw.com  [civilrights/discrimination]; 
http://victorialherring.typepad.com/serendipity/  [personal].