title: Could not find 'minitest' (>= 5.1) among 39 total gem(s) (Gem::MissingSpecError)
body: <p>I m trying to install Pod on my mac os (os version is big sure), and I m using Xcode 13.1</p>
  <p>I m trying to install Pod with this command from terminal:</p>
  <pre><code>sudo pod install
  </code></pre>
  <p>then the system ask me password, after that I can see this error in terminal line:</p>
  <pre><code>Traceback (most recent call last):
      16: from /usr/local/Cellar/cocoapods/1.11.2_1/libexec/bin/pod:23:in `&lt;main&gt;'
      15: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `activate_bin_path'
      14: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `synchronize'
      13: from /Library/Ruby/Site/2.6.0/rubygems.rb:286:in `block in activate_bin_path'
      12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
      11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
      10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1406:in `block in activate_dependencies'
       8: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
       7: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
       6: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       5: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1406:in `block in activate_dependencies'
       4: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
       3: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
       2: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       1: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1400:in `block in activate_dependencies'
  /Library/Ruby/Site/2.6.0/rubygems/dependency.rb:311:in `to_specs': Could not find 'minitest' (&gt;= 5.1) among 39 total gem(s) (Gem::MissingSpecError)
  Checked in 'GEM_PATH=/Users/michelecastriotta/.local/share/gem/ruby/2.6.0:/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0:/usr/local/Cellar/cocoapods/1.11.2_1/libexec' , execute `gem env` for more information
      16: from /usr/local/Cellar/cocoapods/1.11.2_1/libexec/bin/pod:23:in `&lt;main&gt;'
      15: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `activate_bin_path'
      14: from /Library/Ruby/Site/2.6.0/rubygems.rb:285:in `synchronize'
      13: from /Library/Ruby/Site/2.6.0/rubygems.rb:286:in `block in activate_bin_path'
      12: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
      11: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
      10: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       9: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1406:in `block in activate_dependencies'
       8: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
       7: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
       6: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       5: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1406:in `block in activate_dependencies'
       4: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1370:in `activate'
       3: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `activate_dependencies'
       2: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1388:in `each'
       1: from /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1399:in `block in activate_dependencies'
  /Library/Ruby/Site/2.6.0/rubygems/specification.rb:1402:in `rescue in block in activate_dependencies': Could not find 'minitest' (&gt;= 5.1) among 39 total gem(s) (Gem::MissingSpecError)
  Checked in 'GEM_PATH=/Users/michelecastriotta/.local/share/gem/ruby/2.6.0:/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0:/usr/local/Cellar/cocoapods/1.11.2_1/libexec' at: /usr/local/Cellar/cocoapods/1.11.2_1/libexec/specifications/activesupport-6.1.4.1.gemspec, execute `gem env` for more information
  </code></pre>
  <p>how can I do to install pod on my mac?</p>