Though larger, the 85W unit does not (in some cases) get as hot as the 60W adapter, and might not generate some of the buzzing noises associated with the 60W unit. Incidentally, some MacBook owners have found that they prefer 85W MacBook Pro adapters to the standard 60W adapters included with their systems. If the MacBook Pro is sleeping or powered off, the 60W adapter will increase the available charge. In other words, while the 60W adapter will generally allow you to operate the MacBook Pro without draining the battery, it may not also increase the available the charge. However, the lower-power unit may not deliver enough power to MacBook Pros to offer simultaneous charging and operation. The 60W adapter can also be used to some extent with both the MacBook Pro and MacBook. It will provide ample power to both the MacBook Pro and MacBook, and will not damage the latter despite a higher-than-necessary wattage. The 85W adapter can be used inconsequentially with both models. So are the two adapters interchangeable? Yes, with a caveat. Both adapters use the same MagSafe connection point that will fit either model. A product specialist at Apple commented that although the packaging indicates use for the MacBook, the power supply would charge a MacBook slower and didn't recommend extended use.'īy default, the MacBook Pro uses an 85W power adapter, while the MacBook uses a 60W power adapter. Their information didn't specify whether it was OK to use it or not OK to use it. I called Apple for a more definitive answer, but was unable to get one. The Apple store employee thought it was a bad idea to use the 85W with the MacBook, as the MacBook comes with a 60w adapter, even though Apple's packaging for the adapter indicated it was also for use with a MacBook. (I have a MacBook Pro and thought it would be good to have an adapter that we could both use). The packaging indicates that it is for use only with a MacBook Pro or MacBook. 'I bought an extra 85W MagSafe Power adapter for my wife's MacBook. de Sequera recently inquired about the interchangability of MacBook and MacBook Pro power adapters.

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