Or... you could have had Migration Assistant fail, as it did for me when I got a new Mac Pro two weeks ago... and have to do all the moving manually (with the old Mac connected in FireWire target disk mode, as Mark recommended). Then it was helpful to search online for a Step by Step Guide to Manual Mac System Migration. I kind of preferred that, as it allowed me to do cleanup and reorganization – just like house moving. But it was tedious. Good thing I do that only every seven years or so. ~Amy