This is a quite simple example how to process solar photos in Aperture (Mac). A Nikon d3100 DSLR at 1961mm focal length (f/9.3) is used to produce the following image.
Image 1: The NEF (raw) photo as it comes from the Nikon DSLR camera
Image 2: The same photo after processing (note the settings used)
Image 3: Once again, the settings used for processing.
Tip: You can create a filter in Aperture(tm) to process many solar photos in one stroke ;-)