I was trying to update the existing pods with the pod install command, but it takes forever to run.
The verbose mode shows it was stuck at the following
I had the same problem, I then realized that I was still running Network Conditioner on "Very Bad Network". Turning that off solved the issue.
Hope that helps someone.
Updated answer for 2019 - the cocoa pods team moved to using their own CDN which solves this issue, which was due to GitHub rate limiting, as described here: https://blog.cocoapods.org/CocoaPods-1.7.2/
TL;DR
You need to change the source line in your Podfile to this:
source 'https://cdn.cocoapods.org/'
                                                                        Even I was thinking the same. If you open Activity Monitor you can see that it is downloading something at there on the name of GIT.
I found this tip useful.
https://stackoverflow.com/a/21916507/563735
After a half of the day of investigating why Analyzing Dependencies takes forever, I found out that I was installing the latest Firebase pod (7.1.0), which relies on GoogleAppMeasurement version 7.1.0, and there was another pod, which is an ad mediation framework, which includes Google-Mobile-Ads-SDK. This SDK was relying on a much lower version of GoogleAppMeasurement ~ 6.0.
I was able to install the pods by commenting out the conflicting pod from the ad mediation.
Something like this:
# Ad network framework
  pod 'SomeMediationNetwork/Core'
#  pod 'SomeMediationNetwork/GoogleMobileAds' # - the conflicting pod
  pod 'SomeMediationNetwork/Facebook'
  pod 'SomeMediationNetwork/SmartAdServer'
  pod 'SomeMediationNetwork/Mopub'
I had to contact the ad mediation library publisher to fix this issue, most probably by updating to the latest Google-Mobile-Ads-SDK pod and releasing a new version.
I hope this one helps some other folks who are banging their head
Sometimes happen to me too and I simply:
pod clean
pod update --verbose
                                                                        Solution for me in 11.2019
Hello i tried a lot of things, but nothing worked. Try just to connect to this site https://cdn.cocoapods.org/ if you can't so just use VPN and do pod install etc. And don't forget to use --verbose for understanding what's happening.