Note,Your power source MUST support 20V PD output via USB C. 45W output or greater is HIGHLY  .

1) Check Your  Mackbook For Charging Requirements

2) Check Your Macbook  Charger's Output & Voltage

3) Check Your USB-C PD Power Supply's Output & Voltage

 20V Power Delivery (PD) is REQUIRED for the USB-C power supply.

Suitable: For  Macbook  adapter  with  L-type connector 

Output Max 60W/45W for compatible with Retina MacBook Pro / Air

MacBook Pro 15 / 13-inch (2006-2012 versions)

MacBook Air 13 / 11-inch (2008-2012 versions)

Cable Length: 6ft

Package includes

    1 x TYPE C to Macbook magnetic Charger Cable