Importing images into Adobe Lightroom 5 is pretty straightforward, I’ve been asked by many people how to do it, so here are a couple of videos that excel in explaining this process.
In the following video, the wonderful Julieanne Kost explains how to import images into an Adobe Lightroom 5 catalog
Here’s a link from Adobe that explains how to move photos from iPhoto into an Adobe Lightroom catalog
You can get Adobe Photoshop Lightroom here