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I know Nikon embeds the shutter count in the EXIF of their NEF raw files.
What's the easiest way to find it?
Just open the photo in Preview, press Command-I (⌘+I) to bring up the Inspector. Click the circled i (ⓘ) tab, and then the Exif tab. At the bottom of the list you'll find Image Number.
This is your camera's shutter count.