I have a problem while installing CocoaPods on MacOS X 10.3. The first try fails with a DependencyError for nap. I install nap and try again with the same result. Uninstalling and reinstalling doesn't help.
andreass-mbp:~ AndreasB$ sudo gem uninstall cocoapods
Password:
andreass-mbp:~ AndreasB$ sudo gem uninstall nap
Successfully uninstalled nap-1.0.0
andreass-mbp:~ AndreasB$ sudo gem install nap
Fetching: nap-1.0.0.gem (100%)
Successfully installed nap-1.0.0
Parsing documentation for nap-1.0.0
Installing ri documentation for nap-1.0.0
1 gem installed
andreass-mbp:~ AndreasB$ sudo gem install cocoapods
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: cocoapods requires nap (~> 0.8); cocoapods-stats requires nap (~> 0.8); cocoapods-core requires nap (~> 0.8.0)
Raphael
Try installing the pre-release version:
sudo gem install cocoapods --pre
My solution is: do
sudo gem install XXX
to each of the dependencies that unable to resolve, one by one.
Then sudo gem install cocoapods
来源：https://stackoverflow.com/questions/32265784/cocoapods-installation-failure-unable-to-resolve-dependencies