Can't reach backoffice PrestaShop Installation With MAMP

[engin]

Hello everyone

Before i started sorry for my English

I've installed PrestaShop 1.7.3.0 on my MacOS High Sierra, successfully. Deleted "install" file and changed "admin" file's name as suggested. After all of these steps, front office worked fine on localhost but i can not reach the backoffice. When i try to enter localhost:8888/admin i see a blank page.

I tried to access backoffice on Safari , Chrome and Firefox but non of them helped. Only Chrome showed me an error text instead of a blank page. I am pasting it wright here.

This page isn’t working

localhost is currently unable to handle this request.

HTTP ERROR 500

"

And as an addition, I am not a programmer but i can follow a simple instruction.

Thank you for your time

 

[sebprov]

I've seen in a another forum topic (in Spanish) about installation on local server that you have to check the php version.

But I´m not sure. I myself having trouble for making 1.7.3 running on a web server with php 7.2...