Backend OK, Frontend redirect error

Hi there,
Running WP 4.5, OSX 10.11.5, MAMP Pro 3.5, Theme 2012
If I access I get a redirect error.
* changed .htaccess to standard WP .htaccess
* deactivated all plugins
* switched theme to 2016
=> same error
I can login to the backend with no problem, http + https.
What else can I do?

I have allowed access for support, just in case you are getting curious. :slight_smile: