Last month, Apple announced it would no longer develop Aperture, its software for professional and prosumer photographers. Adobe wants Aperture users to move to its own Lightroom software and has created a guide for those who are interested in transitioning from Aperture to Lightroom.
It’s available for download at http://tinyurl.com/mulcpee. Additionally, Adobe has other resources (http://tinyurl.com/kz8dtvj) to help you learn Lightroom. Lightroom is a cornerstone of the new Creative Cloud Photography plan which gives users Photoshop, Lightroom and Lightroom mobile for $9.99/month.