How about Photo View also supports Retina

Although Dolphin 7.3 photo modules have support Apple's Retina display,  but only only thumbnail (browse) support for Retina. for now:

        $this->aFilesConfig = array (

            'icon' => array('postfix' => '_ri.jpg', 'size_def' => 32, 'square' => true),

            'thumb' => array('postfix' => '_rt.jpg', 'size_def' => 64, 'square' => true),

            'browse' => array('postfix' => '_t.jpg', 'size_def' => 240, 'square' => true),

            'browse2x' => array('postfix' => '_t_2x.jpg', 'size_def' => 480, 'square' => true),

            'file' => array('postfix' => '_m.jpg', 'size_def' => 600),

            'original' => array('postfix' => '.{ext}'),

        );

https://github.com/boonex/dolphin.pro/issues/395

I'm looking forward to a better dolphin.

Thank you AlexT, Best regards.