I guess many of us were waiting for this: the possibility to use Sigma's excellent…
Adobe Releases Free “Aperture Importer” Plug-In
Apple will no longer develop and support Aperture (and iPhoto). The best thing you can do is to import your existing Aperture libraries into Adobe Lightroom 5. Could be a taunting task if done manually. Fortunately Adobe just released a free tool for the migration from Aperture (or iPhoto) to Lightroom 5. Download it here.
[via PetaPixel]