1. 更新ruby到最新版本

brew install ruby

...
By default, binaries installed by gem will be placed into:
  /opt/homebrew/lib/ruby/gems/3.4.0/bin

You may want to add this to your PATH.

ruby is keg-only, which means it was not symlinked into /opt/homebrew,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

If you need to have ruby first in your PATH, run:
  echo 'export PATH="/opt/homebrew/opt/ruby/bin:$PATH"' >> ~/.zshrc

For compilers to find ruby you may need to set:
  export LDFLAGS="-L/opt/homebrew/opt/ruby/lib"
  export CPPFLAGS="-I/opt/homebrew/opt/ruby/include"

For pkg-config to find ruby you may need to set:
  export PKG_CONFIG_PATH="/opt/homebrew/opt/ruby/lib/pkgconfig"

接下来直接使用/opt/homebrew/opt/ruby/bin目录下的gem

1. 修改源

   /opt/homebrew/opt/ruby/bin/gem sources --remove https://gems.ruby-china.com/
   /opt/homebrew/opt/ruby/bin/gem sources -a https://mirrors.cloud.tencent.com/rubygems/
   

2. 安装

   /opt/homebrew/opt/ruby/bin/gem install jekyll github-pages
   /opt/homebrew/opt/ruby/bin/bundle add webrick
   

3. 运行

   /opt/homebrew/opt/ruby/bin/bundle exec jekyll serve