pod install 出错 curl: (56) SSLRead() return error -9806

[hw20101101]

`[!] /bin/bash -c
set -e
sh build.sh cocoapods-setup

core is not a symlink. Deleting...
Downloading dependency: core 1.3.1
Downloading core failed:
curl: (56) SSLRead() return error -9806`

请问这个怎么解决？
我照着这个上面的方法试了一次，但还是报错。
链接： http://stackoverflow.com/questions/26461966/osx-10-10-curl-post-to-https-url-gives-sslread-error