需要注意的是，如果您正在从一个SSL证书受内部证书颁发机构信任的源获取宝石(或者您正在通过带有SSL检查的公司web代理连接到一个外部源)，请将SSL_CERT_FILE env变量指向您的证书链。这很可能只需要将您的根证书从证书存储(macOS上的系统密钥链)导出到您的shell中可访问的位置，即:

export SSL_CERT_FILE=~/RootCert.pem

同样的问题，但不同的宝石:

Gem::RemoteFetcher::FetchError: SSL_connect returned=1 errno=0 state=SSLv3 
read server certificate B: certificate verify failed 
(https://bb-m.rubygems.org/gems/builder-3.0.0.gem)
An error occured while installing builder (3.0.0), and Bundler cannot continue.
Make sure that `gem install builder -v '3.0.0'` succeeds before bundling.

临时解决方案:gem install builder -v '3.0.0'使继续包安装成为可能

这个问题现在应该得到解决。更新rubygems (gem Update——system)，确保openssl在你的操作系统上是最新版本，或者尝试这些提示，它仍然无法工作:http://railsapps.github.com/openssl-certificate-verify-failed.html

简单的复制粘贴指令这里给出关于.pem文件

https://gist.github.com/luislavena/f064211759ee0f806c88

证书验证失败

If you've read the previous sections, you will know what this means (and shame > on you if you have not). We need to download AddTrustExternalCARoot-2048.pem. Open a Command Prompt and type in: C:>gem which rubygems C:/Ruby21/lib/ruby/2.1.0/rubygems.rb Now, let's locate that directory. From within the same window, enter the path part up to the file extension, but using backslashes instead: C:>start C:\Ruby21\lib\ruby\2.1.0\rubygems This will open a Explorer window inside the directory we indicated. Step 3: Copy new trust certificate Now, locate ssl_certs directory and copy the .pem file we obtained from previous step inside. It will be listed with other files like GeoTrustGlobalCA.pem.

对于Windows机器，检查您的gem版本

gem --version

然后更新你的宝石如下:

1.8运行。X:下载1.8.30 2.0运行。X:下载2.0.15 2.2运行。X:下载2.2.3

请将该文件下载到您稍后可以指向的目录中(例如。你的硬盘的根目录C:)

现在，使用命令提示符:

C:\>gem install --local C:\rubygems-update-1.8.30.gem
C:\>update_rubygems --no-ri --no-rdoc

现在，bundle安装将成功，没有SSL证书验证错误。

更详细的说明在这里

如果你在mac上使用最新版本的RVM(~1.20)，下面的命令适合我。

rvm osx-ssl-certs update