Unfortunately, importing from iPhoto to Adobe Photoshop Lightroom is harder than it should be but there is an efficient solution. The secret to creating a new Adobe Photoshop Lightroom Catalog from an existing iPhoto image library is to download and install the free-trial version of Photoshop Elements 12. This sounds completely bizarre, but Photoshop Lightroom lacks the ability to import directly from iPhoto and iPhoto lacks a merge with Lightroom feature. Although Lightroom cannot import images from your existing iPhoto library, Photoshop Elements 12 can!
Even the free-trial version of Photoshop Elements 12 has the ability to import from iPhoto and then Lightroom 5 can import from Elements. Photoshop Elements 12 is ironically the missing link for those looking to move their images from iPhoto into Lightroom.
Learn more about How To Import Your iPhoto Library Into Adobe Photoshop Lightroom at http://bit.ly/1sNdss2