Compressor 4.2.1 - Technical Specifications

• OS X v10.10.4 or later
• 4GB of RAM (8GB of RAM recommended for 4K)
• OpenCL-capable graphics card or Intel HD Graphics 3000 or later
• 256MB of VRAM (1GB recommended for 4K and 3D titles)
• 1.2GB of disk space

For more information see http://www.apple.com/final-cut-pro/compressor/specs/.