charged and amber or red if the battery is charging. MagSafe can be found on the MacBook (2006–2011), MacBook Pro (2006–2012) and MacBook Air (2008–2011) notebook computers. The Apple LED Cinema Display and Thunderbolt Display include built-in MagSafe chargers. The MacBook and the 13-inch MacBook Pro use a 60 W MagSafe charger, whereas the 15- and 17-inch MacBook Pro use an 85 W version. The MacBook Air used a lower-powered 45 W version. According to Apple, an adapter with a higher wattage than that originally provided may be used without problems. Apple formerly offered a "MagSafe Airline Adapter" for use on certain compatible airplanes. It had a DC input (instead of AC like the original MagSafe chargers) and would power the computer, but would not charge the battery. MagSafe 2 MagSafe 2 was introduced on the MacBook Air and MacBook Pro with Retina Display at the 2012 Worldwide Developers Conference on June 11, 2012. It was made thinner to fit the thinner laptops, and also wider to preserve magnetic grip force. It also returns to the T-shaped design that points straight out, rather than the L-shape that runs along the side of the machine. MagSafe 2 can be found on the MacBook Pro (2012–2015) and MacBook Air (2012–2017) notebook computers. The resulting shape is incompatible with the older MagSafe connector; Apple released a MagSafe to MagSafe 2 adapter that was also bundled with the Thunderbolt Display, which used the original MagSafe connector. MagSafe 3 On October 18, 2021, Apple announced the M1 Pro and M1 Max 14-inch and 16-inch MacBook Pro models with MagSafe 3. MagSafe 3 is slimmer than its predecessor and connects to a power supply using a removable cable with a USB-C end. It supports up to 140 W power delivery on the 16-inch MacBook Pro with its bundled 140 W GaN power supply that supports USB-C Power Delivery 3.1. In June 2022, Apple announced the M2 MacBook Air with MagSafe 3, and three new color-matching cables. Pinout The MagSafe connector pins allow for the adapter to be inserted in either orientation. The first and second pins on each side of the tiny central pin have continuity with their mirror pins. The inner large pins are V+ (14.5 / 16.5 / 18.5 / 20 V DC). Measuring with no load will give 6.86 V DC for MagSafe and about 3 V DC for MagSafe 2; the full