Erro: PHP extensions para Laravel

Após descomentar as extensões para uso no laravel tive o seguinte `warning`, prejudicando o funcionamento do app em laravel.

PHP Warning: PHP Startup: Unable to load dynamic library ''/usr/lib/php/extensions/no-debug-non-zts-20160303/php_mbstring.dll'' - dlopen(/usr/lib/php/extensions/no-debug-non-zts-20160303/php_mbstring.dll, 0x0009): closured error in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library ''/usr/lib/php/extensions/no-debug-non-zts-20160303/php_openssl.dll'' - dlopen(/usr/lib/php/extensions/no-debug-non-zts-20160303/php_openssl.dll, 0x0009): closured error in Unknown on line 0

Obs.: Problema ocorrendo no mac.