安装Laravel4 -说我需要Mcrypt，但我刚刚安装了它

我试图在我的10.6 Mac/PHP 5.4.14上安装Laravel4。我好像掉进了一个兔子洞。

在"composer install"之后…命令行显示我需要Mcrypt PHP扩展。所以我试着安装它，我被告知我必须安装Mhash。所以我安装了Mhash ..然后回去安装Mcrypt

extension = mcrypt.so
Libraries have been installed in:
/Users/****/downloads/php-5.4.14/ext/mcrypt/modules

然后我回去安装Laravel 4，现在我显示这个

PHP Warning:  PHP Startup: Unable to load dynamic library '/opt/local/lib/php/extensions/no-debug-non-zts-20100525/intl.so' - dlopen(/opt/local/lib/php/extensions/no-debug-non-zts-20100525/intl.so, 9): image not found in Unknown on line 0
Loading composer repositories with package information
Installing dependencies from lock file
Nothing to install or update
Generating autoload files
PHP Warning:  PHP Startup: Unable to load dynamic library '/opt/local/lib/php/extensions/no-debug-non-zts-20100525/intl.so' - dlopen(/opt/local/lib/php/extensions/no-debug-non-zts-20100525/intl.so, 9): image not found in Unknown on line 0
Laravel requires the Mcrypt PHP extension.

. .我以为我已经解决了这个问题。所以问题…但我好像安装了旧版本?

Module compiled with module API=20090626
PHP    compiled with module API=20100525
These options need to match
in Unknown on line 0
Laravel requires the Mcrypt PHP extension.

所以谁能给我一点观点，并指出我在正确的方向?我对编译PHP有点模糊