you can just do the below on Mac
//backup just incase
mv /opt/homebrew/opt/opensearch/libexec/config/jvm.options /opt/homebrew/opt/opensearch/libexec/config/jvm.options.old
//Copy the default
cp /opt/homebrew/opt/opensearch/libexec/config/jvm.options.default /opt/homebrew/opt/opensearch/libexec/config/jvm.options