MAC升级到10.13后cocoapods报错

1. applematoiMac:~ apple$ cd /Users/apple/Desktop/XiangMu2.applematoiMac:XiangMu apple$ pod update MJRefresh此时出现错误一：-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory3.终端输入： sudo gem install -n /usr/local/bin cocoapods此时出现错误二：Password:Sorry, try again.Password:Sorry, try again.Password:sudo: 3 incorrect password attempts这里是因为mac的用户与群组里面没有给当前用户设置密码，设置好密码后就好了。4.重复3的输入内容此时出现错误三：ERROR:  While executing gem ... (TypeError)    no implicit conversion of nil into String5.终端输入：pod --version再次提示：-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory6.终端输入：gem update --system此时出现错误四：ERROR:  While executing gem ... (Gem::FilePermissionError)    You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory.7.解决办法：（a）在终端输入：sudo gem update --system 提示：RubyGems system software updated表示成功8.（b）在终端再输入：sudo gem install -n /usr/local/bin cocoapods
提示成功后，可以查看 cocoapods 是否为最新版本9.此时再次输入：pod update MJRefresh出现错误五： error: RPC failed; curl 18 transfer closed with outstanding read data remaining fatal: The remote end hung up unexpectedly fatal: early EOF fatal: index-pack failed[!] CocoaPods was not able to update the `master` repo. If this is an unexpected issue and persists you can inspect it running `pod repo update --verbose`此时，当再次输入pod update MJRefresh的时候，就更新成功了，就是特别慢。。。