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Now, open Terminal (type 'terminal' into spotlight). (right click and 'Save link as' and save into your Downloads folder)
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This makes it possible to use the image carousel preview for reviewing the images quickly. So I wrote a small script to extract the photos and rename them so they have the proper file extension. However, the majority of them were not photos for me. Looking in the /Users//Library/Application Support/MobileSync/Backups folder is effective but very time consuming, especially if you have a lot of files/images in your backup (my phone a 16GB iPhone 5 that is pretty full had nearly 7000 files in there). As an expansion to Macjack's answer, here's the process I just followed to retrieve the lock screen wallpaper on my phone.
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