Script or Option For Audo Tune In Garage Band For Mac

macOS and Mac Apps

Hello all,
Does anyone have a script made up for garageband, to get the pitch corection working? If not, does anyone know how to pitch corect? I have a Macbook air with MacoS Seria, using the latest version of Garageband. If not, can I get a free adin for pitch corection?
Thank you