Æ Ø Å problemer på mac

package september;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Properties;

public class PropertiesFun {
    public static void main(String[] args) throws IOException {
        // do not work
        try(InputStream is = new FileInputStream("/work/dk_utf8.txt")) {
            Properties p = new Properties();
            p.load(is);
            System.out.println(p.get("dk"));
        }
        // do work
        try(InputStream is = new FileInputStream("/work/dk_iso88591.txt")) {
            Properties p = new Properties();
            p.load(is);
            System.out.println(p.get("dk"));
        }
        // do work
        try(InputStream is = new FileInputStream("/work/dk_utf8.txt")) {
            Reader r = new InputStreamReader(is, "UTF-8");
            Properties p = new Properties();
            p.load(r);
            System.out.println(p.get("dk"));
        }
        // do work
        try(InputStream is = new FileInputStream("/work/dk_iso88591.txt")) {
            Reader r = new InputStreamReader(is, "ISO-8859-1");
            Properties p = new Properties();
            p.load(r);
            System.out.println(p.get("dk"));
        }
    }
}