Unable to restore psql database from pg_dump with a different username

The problem is with the dumping. With insight from this post I was able to resolve this using:

// On Computer1

pg_dump dbname -O -x > backupname.sql


// On Computer2

psql dbname < backupname.sql

The option flags used with pg_dump are:

-O   <-- No owner
         Do not output commands to set ownership of objects to match the original database

-x   <-- No privileges
         Prevent dumping of access privileges (grant/revoke commands)

See the PostgreSQL docs for pg_dump for more info on the option flags.

You don't need to cripple your dump by discarding owner/privileges. You can do it at restore time.

Use pg_restore with the --no-acl (and probably --no-owner) options:

-x
--no-privileges
--no-acl
    Prevent restoration of access privileges (grant/revoke commands).

--no-owner
    Do not output commands to set ownership of objects to match the
    original database. By default, pg_restore issues ALTER OWNER or SET
    SESSION AUTHORIZATION statements to set ownership of created schema
    elements. These statements will fail unless the initial connection
    to the database is made by a superuser (or the same user that owns
    all of the objects in the script). With -O, any user name can be
    used for the initial connection, and this user will own all the
    created objects.

So something like:

pg_restore --no-privileges --no-owner -U postgres --clean ... $Your_sql_backup