I decided to upgrade with MAMP Pro since it made virtual hosts much easier, however it cut my production when Navicat told me that it failed to connect. I made sure it wasn’t a port or login error, and it worked with phpMyAdmin.
Thanks to this thread about the same issue with MAMP conflict with Navicat, it needed a socket to connect.
When you connect with Navicat, you go under the Advanced properties and enter the following in.
/Applications/MAMP/tmp/mysql/mysql.sock