This software will not run on modern macOS (any version from the last 15 years) because it requires the "Rosetta" translation environment, which Apple dropped after Mac OS X Snow Leopard. Red Flags for "Exclusive" DMG Files
: Adobe has officially shut down the activation servers for legacy versions like CS3 and earlier. This means that even with a legitimate serial number, it is no longer possible to activate or re-install the software through standard Adobe channels. Operating System Incompatibility adobephotoshopcsmacosxdmg exclusive
: Adobe officially decommissioned the activation servers for versions like This software will not run on modern macOS