What I have done is below.

Install MySql-5.7.6 ~ .dmg(Community Server) and workbench.

Turn off the server on OSX System preferences.

Access MySql with console. The command wasmysqld_safe --skip-grant

Executeupdate user set password=password('1111') where user='root';and got an error message -->ERROR 1054 (42S22): Unknown column 'password' in 'field list'.

byway:

1.mysql>usemysql;

2.mysql>show tables;

3.updateusersetauthentication_string=password('1111')whereuser='root';

ok