CS5 was PowerPC and 32-bit Intel. Modern macOS (Catalina and later) dropped support for 32-bit apps entirely . You cannot run CS5 on Apple Silicon (M1/M2/M3) or macOS Ventura/Sonoma/Sequoia. You would need a virtual machine running OS X Snow Leopard or a vintage 2012 MacBook Pro.
: This site provides direct download links for the official Adobe CS5 installers. Note that you must follow their specific instructions (like setting a session cookie by visiting an official Adobe page first) for the links on ProDesignTools to work. adobe master collection cs5 download
The Adobe Master Collection CS5 is a comprehensive suite of creative applications designed for professionals and enthusiasts who need a wide range of tools for their creative projects. This collection was released in 2010 and includes: CS5 was PowerPC and 32-bit Intel