Drush db connection issues after upgrading to MAMP 4?
Figured this out by adding the following to my .bash_profile file and modifying the PHP versions to match what's in MAMP. Working just fine again.

export PATH="/Applications/MAMP/Library/bin:/Applications/MAMP/bin/php/php5.4.45/bin:$PATH"
export PATH="/Applications/MAMP/Library/bin:/Applications/MAMP/bin/php/php5.5.38/bin:$PATH"
export PATH="/Applications/MAMP/Library/bin:/Applications/MAMP/bin/php/php5.6.25/bin:$PATH"
export PATH="/Applications/MAMP/Library/bin:/Applications/MAMP/bin/php/php7.0.10/bin:$PATH"


After this run:

source ~/.bash_profile