Your Mac's Serial Number via the Command Line

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Here’s my first (admittedly ugly) attempt: 
 system_profiler SPHardwareDataType | grep 'Serial' | sed 's/^.*\:\ //' 
 Here’s a better one from stack exchange : 
 system_profiler SPHardwareDataType | awk '/Serial/ {print $4}' 
 Check your warranty status: 
 Update: Within a year or two of this post, Apple disabled direct URL links to hardware warranty checks, so the…

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