If you are using a legacy Mac system (like a PowerBook or early Mac Pro), the basic setup followed these steps:
Adobe CS3 was the version of Photoshop. This meant it could run natively on both older PowerPC Macs (G4, G5) and the new Intel Macs (MacBook Pro, Mac Pro) without requiring the slow Rosetta emulation layer. Photoshop Cs3 For Mac
To understand the value of CS3, one must understand the state of Apple in 2007. Steve Jobs had just announced the transition from PowerPC processors (G4, G5) to Intel Core 2 Duo chips. This created a massive software compatibility crisis. If you are using a legacy Mac system