I put MAMP server up on my new dev machine OS X 10.15.2
It works, but it only serves it as pure text, not as correctly formatted / rendered HTML, the < > tags don't work.
if I call 'localhost' in the address bar, it lists the files in the localhost 'htmldocs' directory, but 'localhost/index.htm' and it dumps the html text, tags and all.
My HTML is:
This is a title
Did I miss a field / checkbox? in setup?