How To Redeem iTunes Gift Card in iTunes
- Open iTunes
- Click the iTunes Store icon on the left menu
- Click the Sign-In button in the top right (if you have not signed-in to the Apple Store on this Mac before)
- Enter your Apple ID and Password
- After you see your email address in the top right (where the Sign-In button was), click the Redeem option in the Quick Links section on the right
- Enter your iTunes Gift Card code
- Press the Redeem button