I have experienced a problem recently when exporting a picture from Aperture to a folder in my Finder - they are quite unsharp. This happens independently from file typ (jpg or Tiff) and also whether I sharpen before exporting or not. It does not happen to pictures that are exported in original size though, only when I choose to export them smaller than the original. I do know that sharpening should be done depending on the picture size, but even the unsharpened pictures end up blurry when exported and resized. I didn’t have this problem with my previous MBP using OSX before the Mavericks up-date.
Thanks for any advice on this,