You need to install Lightroom on the mac machine, once you open it go to File >> Plugin Extras >> Import from Aperture.
For more information please refer : Moving from Aperture to Lightroom – Lightroom Solutions – John Beardsworth
Hope that helps.
Thank you for the quick reply.
I take it the plug in is therefore to transfer files from aperture to lightroom on the SAME machine.
My problem is transferring the aperture photo library from a mac to a different machine- a PC. Can you point me in the right direction to do this?
You can export all the images out and copy it on the external drive and paste it on machine.
Because Lightroom also gonna to do the same thing, it will create a master copy side by side while importing the thumbnails into the catalog.
I have now transferred my aperture library from my mac to lightroom on the same mac.
Is there a way to export these photos to an external hard drive and keep them organised in the same albums/projects so that I can then import them to a PC without losing the albums/projects?
There are a few export options in lightroom and I'm not sure which to choose.
Sorry for harrassing you...