Unity. Strip all packing tags in the folder. Script accepts one argument which is the folder in which to search for meta files.

strip_packing_tag.sh

#!/bin/bash

# script accepts one argument which is the folder in which to search for meta files.
# on MacOS sed -i is required to have extension of the backup file, script will remove 
# backups in the end.

cd "$@"

for name in `find . -name "*.meta"`; 
do
    echo "Strpping tag in $name"
    sed -i '.mybakfile' 's/spritePackingTag:.*$/spritePackingTag: /g' $name
done

for name in `find . -name "*.mybakfile"`; 
do
    echo "Removing $name"
    rm $name
done