While Adobe has moved on to versions 2021, 2022, and beyond with AI-driven "Neural Filters," Photoshop 2020 (version 21.x) remains a favorite for many professionals. It represents a mature point in the software’s lifecycle where the engine was optimized for the Metal graphics API used in macOS, resulting in smooth rendering and fast processing.
Adobe once released Photoshop CS2 for free, but that was for legacy activation servers. for modern Macs. It will not work on macOS 10.15 or newer due to 32-bit architecture deprecation. Adobe Photoshop 2020 for Mac Free Download