Suitable for older Mac-Books and other USB C chargers converted to Mag-Safe 1 (L-Tip). Converted USB C charger design: This USB C to Mag-Safe 1 (L-Tip) converter is designed to convert Mac-Book / Pro USB C chargers and use the Mag-Safe 1 (L-Tip) interface to charge older Mac-Books, so it preserves the value of your investment in the charger and makes your life easier. Compatibility: This USB C to Magnetic 1 (L-Tip) charger adapter cable is compatible for older Mac-Books power adapter.