Thank you both.
You're right, I've edited my post accordingly.
@mitu thanks but still could not get to work - I've found instructions on how to reformat a retropie SD card on mac, will just start again with fresh image :)
@mitu Thanks man! I didn't know that. I will start doing that as I'm going to mess around with doom and costume images for the scraper, so all my rom hacks look pretty!
@herb_fargus Thanks herb!