Brian,
There is an import wizard on the PC side that will look for an existing BeerSmith install and allow you to import your recipes, equipment profiles and inventory. If you have added custom items to inventory, it might not match those and you may need to move them manually.
For the Mac (and those who prefer to move things over selectively) you can export any of your BeerSmith 1 files to a BSM file and the open that file in BeerSmith 2, and selectively copy/paste any items you want into your recipes view or any of the other ingredient databases.
I'm working on a video to cover both cases.
Brad