I\'m using with latest php version 7.2 on macOS Mojave and receiving error like
$composer require mongodb/mongodb
Using version ^1.4 for mongodb/mongodb
./comp
Install PHP extension by running this command on your terminal.
sudo pecl install mongodb
At the end, you will see following information.
Build process completed successfully
Installing '/usr/local/Cellar/php/7.3.3/pecl/20180731/mongodb.so'
install ok: channel://pecl.php.net/mongodb-1.5.3
Extension mongodb enabled in php.ini
and then restart your PHP service.