How do I install the MagMi for Magento 2 extension?
There is not install for magmi just Copy magmi in main folder
/magmi
and just the following your url you will be able to access the magmi
http://installmagentourl/magmi/web/magmi.php and use default user: magmi paswd: magmi
You are good to go..
One thing more
go to magmi/inc/magmi_engine.php replace the one 511 line and replace else code and add you credential
else {
$host = $this->getProp("DATABASE", "host", "localhost");
$dbname = $this->getProp("DATABASE", "dbname", "magento");
$user = $this->getProp("DATABASE", "user",'root');
$pass = $this->getProp("DATABASE", "password",'root');
$port = $this->getProp("DATABASE", "port", "3306");
}