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How to determine Mac OS X version in shell script?

I need to run make with one parameters set if it is running under Capitan and with other parameters in Sierra. In other words: I run in command line:

sw_version ProductName: Mac OS X ProductVersion: 10.13.6

How I can get the value of ProductVersion to the variable and check it if current OS version <10.13 then else

Solution

  • try the sw_vers command. See examples here : https://www.cyberciti.biz/faq/mac-osx-find-tell-operating-system-version-from-bash-prompt/

    to get product version : 

    sw_vers | grep ProductVersion | cut -d':' -f2

    to compare the parsed value :

    base_ver=10.13
ver=$(sw_vers | grep ProductVersion | cut -d':' -f2 | tr -d ' ')
if [ $(echo -e $base_ver"\n"$ver | sort -V | tail -1) == "$base_ver" ]
then 
   echo "older"
else 
   echo "newer"
fi