Print current Mac wattage (with accuracy up to minute)

mac-wattage.sh

#!/usr/bin/env bash

set -euo pipefail

function extract_float_field() {
    field=$1
    ioreg -rw0 -c AppleSmartBattery |
        grep BatteryData |
        sed -E "s/.*\"$field\"=([0-9]+).*/\1/" |
        xargs -I % lldb --batch --source-quietly --one-line "print/f %" | # Convert IEEE-754 float
        grep --only-matching --extended-regexp '[0-9]+(\.[0-9]+)?'
}

printf -- 'Charging (watt): '
extract_float_field AdapterPower

printf -- 'Consumption (watt): '
extract_float_field SystemPower

This works fine on an Intel Mac.

On a M1, M2 or M3 machine the script needs some adjustments due to xargs yielding slightly different output:

(lldb) print/f 1095450523
(int) 12.7030287

Hence the lines 11 and 12 need to be changed to:

        grep -o '(int) [0-9.]*' |
        sed 's/(int) //'

This works fine on an Intel Mac.
On a M1, M2 or M3 machine the script needs some adjustments due to xargs yielding slightly different output:

Thank you! Just revised the script to make it not relying on lldb output format. However, I've not tested it on an Intel Mac. Will you be able to test it there?

Thanks, the script outputs the wattage nicely on an Intel based MacBook Pro.