pod update 遇到如下问题:

More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.

If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.

这是因为spec中的某个链接的SSL证书是不安全的

如需解决就需要暂时的关闭curl的安全验证,解决如下:

终端键入 : echo insecure >> ~/.curlrc

或者

Finder ->  前往文件夹 -> ~/.curlrc -> 手动输入 insecure

为了安全起见,pod完记得删掉 insecure