# system_profiler
# Report system hardware and software configuration (Mac OS X)

# Display a full system profiler report which can be opened by
# 'System Profiler.app'.
system_profiler -xml > MyReport.spx

# Display an overview of system hardware (Model, CPU, Memory, Serial, etc).
system_profiler SPHardwareDataType

# Print the system's serial number.
system_profiler SPHardwareDataType|grep "Serial Number (system)" |awk '{print $4}'