
From a Mac grayscale fix to Photoshop: how a student’s code reshaped image editing
Thomas Knoll wrote a small utility in 1987 to simulate grayscale on a Mac, which his brother John Knoll helped turn into an integrated application. Adobe Photoshop 1.0 launched in 1990, and over the ensuing decades it transformed photography, publishing, film, and web design as hardware, printers, and digital cameras matured to meet its capabilities.












