Is there any way to allow someone to download the whole shared Photos folder on Dropbox and not only individual files? Preferable a solution that doesn't require the receiver to register on Dropbox?
You could try this method posted on Mac OS X Hints:
(As at 17 Oct 2013), When you open the shared folder listing all the images, click on 'Share Link' icon at the top, then click on the 'Get Link' button in the dialog that opens, then click on the round 'tool' icon beside then 'Share' button at the top of the page, then select 'download as .zip'.
protected by Community♦ Jan 15 '14 at 21:20
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