Problème installation GeoSwift par Cocoapods

Bonjour j’en suis à la leçon 4.3 sur "maîtriser la création d’apps iPhone et je n’arrive pas à installer GeoSwift dans Cocoapods. j’en suis dans le terminal ou je viens d’installer homebrew mais j’ai toujours un problème voici mon terminal

 Last login: Sun Apr  1 10:36:49 on ttys003
MacBook-Pro:~ gigimac$ 
MacBook-Pro:~ gigimac$ sudo gem install cocoapods
Password:
wSuccessfully installed cocoapods-1.4.0
aParsing documentation for cocoapods-1.4.0
negain
Done installing documentation for cocoapods after 4 seconds
1 gem installed
MacBook-Pro:~ gigimac$ wanegain
-bash:............: command not found
MacBook-Pro:~ gigimac$ brew install autoconf automake libtool
Error: Can't create update lock in /usr/local/var/homebrew/locks!
Fix permissions by running:
  sudo chown -R $(whoami) /usr/local/var/homebrew
Error: Permission denied @ rb_sysopen - /usr/local/var/homebrew/locks/autoconf.formula.lock
MacBook-Pro:~ gigimac$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew

Press RETURN to continue or any other key to abort
==> Downloading and installing Homebrew...
error: could not lock config file /usr/local/Homebrew/.git/config: Permission denied
fatal: could not set 'core.repositoryformatversion' to '0'
Failed during: git init -q
MacBook-Pro:~ gigimac$ brew install autoconf automake libtool
Error: Can't create update lock in /usr/local/var/homebrew/locks!
Fix permissions by running:
  sudo chown -R $(whoami) /usr/local/var/homebrew
Error: Permission denied @ rb_sysopen - /usr/local/var/homebrew/locks/autoconf.formula.lock
MacBook-Pro:~ gigimac$ 
MacBook-Pro:~ gigimac$ brew install autoconf automake libtool
Error: Can't create update lock in /usr/local/var/homebrew/locks!
Fix permissions by running:
  sudo chown -R $(whoami) /usr/local/var/homebrew
Error: Permission denied @ rb_sysopen - /usr/local/var/homebrew/locks/autoconf.formula.lock
MacBook-Pro:~ gigimac$ 

quelqu’un serait-il pourquoi?

Il semble que tu aies un problème de droits sur le dossier que Homebrew voudrait utiliser.
Par contre j’ai l’impression qu’il te dit quoi faire pour résoudre le problème :