Airfoil is one of the most interesting applications for all those who want to send audio from their Mac to an important variety of Apple devices, and it is to be appreciated that with the coming release of OS X El Capitan and the new Apple TV its developer (Rogue Amoeba) already has it ready for action .
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Airfoil version 4.9 comes with more news in addition to the aforementioned compatibility, and it presents us with a new version of Instant On (8.1.1) with native support for El Capitan. In addition, it is now much more reliable when it comes to analyzing the album art of the song in play, and the icons in the menu bar have been updated including versions compatible with the increasingly popular Retina versions for the MacBook and iMac that they equip said very high resolution.
On the negative side for some users is that Airfoil 4.9 It is no longer compatible with all OS X prior to Mavericks, so if you have a system prior to it, you will not be able to update and benefit from these improvements, something that on the other hand falls within the logic since Apple depreciates over time some old and new features are only available on the latest operating systems.
air foil It is still paid, although it can be tried for a while for free as a trial. And you also have to remember that by not complying with Apple regulations, it is not sold in the Mac App Store.