ivnbkn

thanks
sorry for late reply ’cause busy at work. hate it

A) I created the database
which username and password shall I know?
of my computer? if yes, ok I know them

B) I a not putting wordpress into htdocs folder as the tutorial here (https://codex.wordpress.org/Installing_WordPress_Locally_on_Your_Mac_With_MAMP) tells me:
<Once you’ve downloaded and unzipped the WordPress download, open up the “wordpress” folder. Click and drag all of the files from the wordpress folder to your MAMP document root (I use /Users/USERNAME/Sites/wordpress/).>
I previously set the apache port at 80 and set the MAMP documents roots in the same folder as showed.

However, I tried the default way too and result is the same.

C) how do I create such a file??

thank you
sorry for being so uncapable