How to print metadata?

Question

I would like to print the exif info of an image.

Answer 1

Are you still interested in printing EXIF metadata? You can program an Apple Script to write the EXIF data (and other meta tags)  to a text file and then print this file, like this:
(* Write Metadata tags to a file
Author: Leonie Dreschler-Fischer
To run this workflow, select some images in Aperture,
then start the workflow by pressing the "Run Button",
or install the workflow as service in ~/Library/Services and launch it from the Services menu in Aperture,
when prompted, enter a filename for the text output
on write_info(im_version, f)
          local nam, w, h, dat, dims, nl
          local res
          tell application "Aperture"
                    set dat to ""
                    set nl to "
                    try
                              set nam to "Name: "
                              set nam to "Version Name: " & (get the name of im_version as string)
  write nam to f
  write nl to f
                    end try
                    try
                              set w to get width of im_version as string
                              set h to get height of im_version as string
                              set dims to "   Dimensions: " & w & "x" & h & nl
  write dims to f
                    end try
                    try
                              tell im_version
                                        set dat to (value of EXIF tag "ImageDate") as string
                              end tell
                              set dat to "   Image Date: " & dat & nl
  write dat to f
                    end try
                    try
                              local thekeywords
                              tell im_version
                                        set thekeywords to (value of IPTC tag "keywords") as string
                              end tell
                              set thekeywords to "   Keywords: " & thekeywords & nl
  write thekeywords to f
                    end try
                    try
                              local rating, isflagged, ispicked
                              tell im_version
                                        set rating to get the main rating of im_version as string
                                        set isflagged to get flagged of im_version as string
                                        set ispicked to get picked of im_version as string
                              end tell
                              set rating to "   Rating: " & rating & ", flagged: " & isflagged & ", picked: " & ispicked & nl
  write rating to f
                    end try
                    try
                              local cam_make, cam_model, camera
                              tell im_version
                                        set cam_make to (value of EXIF tag "Make") as string
                                        set cam_model to (value of EXIF tag "Model") as string
                              end tell
                              set camera to "   Camera: " & cam_make & " " & cam_model & nl
  write camera to f
                    end try
                    try
                              local focal_length, aperture_value, shutter_speed, capture
                              tell im_version
                                        set focal_length to (value of EXIF tag "FocalLength") as string
                                        set aperture_value to (value of EXIF tag "ApertureValue") as string
                                        set shutter_speed to (value of EXIF tag "Shutterspeed") as string
                              end tell
                              set capture to "   Focal Length: " & focal_length & "mm, Aperture: f/ " & aperture_value & ", Shutter Speed: " & shutter_speed & "s" & nl
  write capture to f
                    end try
                    return nam
          end tell
end write_info
on run {input, parameters}
  (* Write EXIF info on all selected images to a file *)
          if input is {} then error "Please select an image."
          local outputFile, item_count, im, inf
          set outputFile to choose file name with prompt "Output File name"
          set the inf to ""
          try
  open for access outputFile with write permission
                    set the item_count to count of input
                    repeat with i from 1 to the item_count
                              set im to item i of input
                              set inf to write_info(im, outputFile)
                    end repeat
  close access outputFile
                    tell application "TextEdit"
  activate
  open outputFile
                    end tell
          end try
          return input
end run
This script can easily be extended to include more EXIF tags, like longitude and latitude. And you can wrap it as an Automator service to be run from the Services menu in Aperture. I put an Automator workflow for download on my webpage:
http://dreschler-fischer.de/FAQ/Scripts_Services/Entries/2012/2/8_Write_EXIF_Inf o_to_a_File.html
To run this service, install it in the "Services" folder in your user library; then select some images in Aperture, and select the service from the Aperture Services menu.
Regards
Léonie