MAMP PRO not showing all MAMP database
I've never used MAMP or even heard of it until I read this question, but if both MySQL installations are the same base version of MySQL you can probably fix this by copying the databases from one installation's data directory to the other.

First, run the following in MySQL in each MySQL installation:

SHOW GLOBAL VARIABLES LIKE 'datadir';


That will tell you where the databases are for each installation.

Next, stop both MySQL installations. This is important because if they are running, you won't be able to make a consistent copy of the data.

Next, make a backup of the MAMP Pro MySQL installation's datadir. You should be able to do this by running the following in a shell:

cp -a &lt;MAMP Pro datadir&gt; &lt;new backup directory&gt;


Now copy the old databases to the new:

cp -a &lt;MAMP datadir&gt; &lt;MAMP Pro datadir&gt;


Finally, start the MAMP Pro instance and confirm whether the databases are present.

You could also do a backup and restore with mysqldump, but a copy is probably simpler especially since this is only for development.