Aperture not downloading images
Software not downloading or exporting recent work. Adds images without preview. Takes forever for an image to download. I also use NIK as a plug in but never had issues before.
MacBook Pro, iOS 6.0.2, Aperture
OS X and Aperture versions?
Update all, then run Apple's trouble-shooting steps. Report back.
Also make sure you have at least 10% free space on your system drive.
Good luck. These things are usually solved.