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I've been following the Flutter install doc at https://docs.flutter.dev/get-started/install/macos/mobile-ios.

When trying to install cocoapods using "sudo gem install cocoapods", I get that "the last version of (SOME APP; VARIES) to support your Ruby & RubyGems was (VERSION). ... (SAID APP) requires Ruby version >= 3.1.0. The current ruby version is 2.6.10.210."

So I thought I should update rubygems.

At rubygems.org, "gem 'algolia', '~> 3.15', '>= 3.15.4'" is not recognized in Terminal ("unknown command algolia"). If I go straight to "gem install algolia" I get the first error again.

Any help would be appreciated.

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    You need to update your ruby (not rubygems). "requires Ruby version >= 3.1.0. The current ruby version is 2.6.10.210"
    – engineersmnky
    Commented Apr 22 at 20:59
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    @engineersmnky Thanks for pointing me in the right direction. Yes, it turns out I did not read/interpret the error carefully enough; Ruby (not rubygems) first and foremost needed updating. I installed the newest Ruby version using Homebrew (I read I shouldn't interfere with the Ruby installation that came with macOS), and then updated Algolia and installed cocoapods without issue.
    – connorhawke
    Commented Apr 23 at 1:55
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    As a rule of thumb, don't use sudo when installing gems. For CocoaPods, it's only necessary when using system Ruby. Since you are installing your own Ruby (as recommended), you can/should use gem install cocoapods as shown in the install guide.
    – Stefan
    Commented Apr 23 at 7:45
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