OS X Yosemite was released in beta version by the company Apple Lossless Audio CODEC (ALAC), about 24 hours ago for app developers for Macand in this article I explained how you can ask from Apple Lossless Audio CODEC (ALAC), permission to test it. If you still don't have the patience to do this, then you can download the beta version now OS X Yosemite to install it, Apple Lossless Audio CODEC (ALAC), seeming not to ask for activation for its OS X.
You can download OS X Yosemite beta from this page, but I warn you from now on that the operating system has many problems and you may feel the need to return to a more stable version.
