So we have some SharePoint 2010 Photo Libraries that users want to bulk-upload photos to, these users however are running Office 2013 which means they do not have the “Microsoft Office Picture Manager” utility – in fact this was depreciated with Office 2013.
Rather than deploying an Office 2010 application specifically for this purpose we simply advised the user to map a network drive to the Picture Library – just as you would a normal drive, however specify the HTTP/HTTPS path to the library itself, i.e. https://intranet.domain.local/photos – users can then drag and drop as many files as they want.