问题
I have one office Mac running MacOS 10.13.2 and Ruby 2.2.1 and it is unable to install or run cocoapods via gems. sudo gem install cocoapods returns the error below. I compared the proxy and DNS configuration and it is identical to other macs that can install successfully.
▶ ping https://rubygems.org
ping: cannot resolve https://rubygems.org: Unknown host
What is causing cocoapods installation to fail with the cryptic no such name (https://rubygems.org/specs.4.8.gz) error message?
I tried the answer from this question: 'sudo gem install cocoapods' doesn't work on ElCapitan 10.11.4 , ERROR: Could not find a valid gem 'cocoapods' (>= 0) in any repository
$ sudo gem install cocoapods --source http://rubygems.org
ERROR: Could not find a valid gem 'cocoapods' (>= 0), here is why: Unable to download data from https://rubygems.org/ - no such name (https://rubygems.org/specs.4.8.gz) Unable to download data from http://rubygems.org/ - no such name (http://rubygems.org/specs.4.8.gz)
回答1:
The problem was resolved by connecting to a mobile hotspot and updating ruby through that.
来源：https://stackoverflow.com/questions/52076749/cocoapods-on-mac-unable-to-install-could-not-find-a-valid-gem-cocoapods-0