The bad news is that Luminar is a Mac-only application. The good news, for those who own a Mac, is that it’s cheap, fun and rather clever. You can use it as a simple standalone photo-editing tool, as a plug-in for Lightroom, Photoshop, Aperture and Elements and even as an editing extension for Apple Photos. It comes in at $69 / £52 / AU$99 for new...