[mac] php@7.4 has been disabled because it is a versioned formula!

brew tap shivammathur/php
brew install shivammathur/php/php@7.4
brew link –overwrite php@7.4

 

출처: http://gigatera.co.kr/wp/m1-php7-4-has-been-disabled-because-it-is-a-versioned-formula/