"At Adobe, we’re working on a migration tool to help you bring your photos into Adobe Photoshop Lightroom from Aperture, but if you’re eager to switch before the tool is ready, this guide can help ease your transition. We recognize that this migration may be a challenging process and offer the following resources and methodology to help get you up to speed with Lightroom and provide a road map for successfully migrating your photos.
The first challenge is that the terminology, layout, and controls of the two applications are different. It’s a good idea to start processing photos in Lightroom and become familiar with it before you migrate your photos from Aperture. You can do so by taking some new photos, importing them into Lightroom, and then using Lightroom.
Here are some resources to get you started with Lightroom:
- The best way to get Lightroom is as a part of the Creative Cloud Photography plan.
- If you would like to try Lightroom, a free 30 day trial is also available.
- Learn the basics of Lightroom with this tutorial: How to manage your digital photos
We are providing a workaround solution for the second challenge of switching: Aperture and Lightroom use different image-processing engines, which means that Lightroom cannot read adjustments made in Aperture. For any photos you have edited in Aperture, you should transfer the original plus a .tiff file with adjustments applied. Then, in Lightroom, you can organize the original and the .tiff file so that they appear alongside each other.
In addition, Lightroom cannot read Aperture color labels, flags, or custom metadata fields. So, before you export your originals, use Smart Albums or the search filter to find images by those attributes, and apply corresponding keywords (for example, Color-red, Flagged, or Meta-ModelRelease-Yes).The steps that follow provide a generalized method for migrating your photos from Aperture to Lightroom. Please keep in mind that this guide outlines a basic workflow: you may need to tailor the steps to fit your particular setup."
Read the entire guide for full details.