Django==1.6.7

 initial_data.json:

[
       {
          "pk":1,
          "model":"auth.user",
          "fields":{
             "username":"admin",
             "password":"pbkdf2_sha256$12000$zTE7EfaDCbn4$28nORrJ0Os4MeEqOrQB4MvpG/dJJSp84dgtjoNnOBBs=",
             "is_superuser":true,
             "is_staff":true,
             "is_active":true
          }
       },
      {
        "model": "contact_info.my_info",
        "pk": 1,
        "fields": {
          "name"           : "Oleg",
          "last_name"      : "Petrov",
          "date_of_birth"  : "03.04.1989",
          "bio"            : "Born in Ukraine.",
          "email"          : "megoloman@ukr.net",
          "jabber"         : "megoloman@42cc.co",
          "skype"          : "megoloman.fun",
          "other_contacts" : ""
        }
      }
    ]

python manage.py convert_to_south contact_info

django.core.serializers.base.DeserializationError: Problem installing fixture '/home/megoloman/Django_1_6_7/bin/42_cc/FortyTwoTestTask/apps/contact_info/fixtures/initial_data.json': Invalid model identifier: 'auth.user'