sysctl Access kernel state information. Show all available variables and their values: sysctl -a Show Apple model identifier: sysctl -n hw.model Show CPU model: sysctl -n machdep.cpu.brand_string Show available CPU features (MMX, SSE, SSE2, SSE3, AES, etc): sysctl -n machdep.cpu.feature Set a changeable kernel state variable: sysctl -w {{section.tunable}}={{value}}