主要原因是安装了rvm的ruby确实在错误的证书目录中进行了检查，而OSX-ruby会在正确的目录中进行检查.

The primary cause for this is the rvm installed ruby does look into the wrong directory for certificates whereas the OSX-ruby will look into the correct one.

您要做的是不使用任何预编译的红宝石，而是在本地计算机上编译红宝石，就像这样:

What you wanna do is NOT TO USE any of the precompiled rubies and rather have ruby compiled on your local machine, like so:

rvm install 2.2.0 --disable-binary

您可以阅读详细说明 https://toadle.me/2015/04/16/fixing-failing-ssl-verification-with-rvm.html