PhotoZoom Pro 2 for Mac - Version 2.3.0 PhotoZoom Pro 2 is software for enlarging digital images, available for OS X 10.3+ and Windows. It is based on S-Spline XL: a renewed and improved version of our patented, self-adjusting S-Spline interpolation technology. S-Spline XL is able to render sharp and crisp clear image magnifications, perfectly focused, yet without the jagged edges, loss of detail or lack of photorealism that normally come with enlarging images.