#!/bin/sh
/usr/bin/vm_stat | sed 's/\.//' | awk '
/free/ {FREE_BLOCKS = $3}
/inactive/ {INACTIVE_BLOCKS = $3}
/speculative/ {SPECULATIVE_BLOCKS = $3}
/wired/ {WIRED_BLOCKS = $4}

END {
printf "Free: %s\n", ((FREE_BLOCKS+SPECULATIVE_BLOCKS)*4096/1048576)
printf "Inactive: %s\n", ((INACTIVE_BLOCKS)*4096/1048576)
printf "Total Free: %s\n" ((FREE_BLOCKS+SPECULATIVE_BLOCKS+INACTIVE_BLOCKS)*4096/1048576)
printf "Wired: %s\n", ((WIRED_BLOCKS)*4096/1048576)
printf "Active: %s\n", (4096-((FREE_BLOCKS+SPECULATIVE_BLOCKS+INACTIVE_BLOCKS+WIRED_BLOCKS)*4096/1048576))
printf "Total Used: %s\n", (((INACTIVE_BLOCKS+WIRED_BLOCKS)*4096/1048576)+(4096-((FREE_BLOCKS+SPECULATIVE_BLOCKS+INACTIVE_BLOCKS+WIRED_BLOCKS)*4096/1048576)))
}'