Composer install - extension intl error but phpinfo() says intl enabled

Macos Catalina 10.15.17
MAMP 6.3 - running php 7.4.12
Codeigniter 4 executed the command 

Code:

> composer create-project codeigniter4/appstarter project-root

following the manual at time of writing 
I do get the error that int is missing like so

Code:

    - codeigniter4/framework[4.0.0, ..., v4.1.8] require ext-intl * -> it is missing from your system. Install or enable PHP's intl extension.

Looked it up and is relatively common and also easy to find you need to install internationalisation. So of course I made sure internationalisation is enabled, which it is when I look at the

Code:

php_info();

ouput but it says internationalisation is enabled.