installしてるにも関わらずrequireできない
sudo gem install sequel
してみる
Operation not permitted - /usr/bin/sequel
権限ないと
brew install ruby
sudo gem install sequel
再度インストール
Fetching: sequel-4.43.0.gem (100%)
Successfully installed sequel-4.43.0
Parsing documentation for sequel-4.43.0
Installing ri documentation for sequel-4.43.0
Done installing documentation for sequel after 15 seconds
1 gem installed
できましたね