The MagSafe to MagSafe 2 Converter allows you to use the MagSafe connector on your LED Cinema Display, Thunderbolt Display, or MagSafe Power Adapter to charge your MagSafe 2-equipped Mac computer. Compatibility 24-inch Apple LED Cinema Display 27-inch Apple LED Cinema Display Apple Thunderbolt Display Apple 45W MagSafe Power Adapter Apple 85W MagSafe Power Adapter MacBook Pro with Retina display MacBook Air with MagSafe 2 power port