Adobe Photoshop is a graphics editing program developed and published by Adobe Systems Incorporated.

System Requirements
Processor:Multicore Intel® processor
OS: Mac OS X v. 10.5.8, 10.6 or 10.7
Ram: 1 GB
Hard Drive: 2GB of available hard-disk space for installation; additional free space required during installation (cannot install on a volume that uses a case-sensitive file system or on removable flash storage devices)
Screen Resolution: 1024x768 display (1280x800 recommended) with qualified hardware-accelerated OpenGL graphics card, 16-bit color, and 256MB of VRAM Some GPU-accelerated features require graphics support for Shader Model 3.0 and OpenGL 2.0
Software: QuickTime 7.6.2 software required for multimedia features

Instructions
-]Open DMG
-]Use instructions
-]Enjoy.