Go to httpd.conf
on /Applications/MAMP/conf/apache
and see if the LoadModule rewrite_module modules/mod_rewrite.so
line is un-commented (without the # at the beginning)
and change these from ...
<VirtualHost *:80>
ServerName ...
DocumentRoot /....
</VirtualHost>
To this:
<VirtualHost *:80>
ServerAdmin ...
ServerName ...
DocumentRoot ...
<Directory ...>
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory ...>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
</VirtualHost>