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Apps that deal with files can handle files correctly on every platform using the latest Bundle and FileManager APIs. Adding support for drag and drop enables a common use pattern on the Mac and makes your iPad app even more versatile. If your app supports standard gesture recognizers for pinch, scroll, rotate, and zoom effects, they will automatically map to appropriate gestures on Mac input devices.
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Supporting iPad Multitasking and Auto Layout lets your app support resizable windows on iPad and Mac. For example, adding keyboard support not only enables the primary interface for the Mac, it also supports the growing number of users who use keyboards with their iPads. There are features available to iPhone and iPad apps that make it easier for them to run on Mac and improve the overall user experience when run on any of these platforms.
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