according to, apple has launched “Mac OS 10.10 beta first to try to apply for”. , if you’re lucky enough to become a top 1 million applicants, so you can be among the first to experience the latest Mac OS system.
we see from the above application page, applicants need to satisfy the following conditions:
use Apple ID application;
existing Mac products system must have been upgraded to Mac OS 10.9;
approved, use conversion code upgrade in the Mac App Store to download the latest system;
use the built-in feedback system, to provide apple use feeling and Suggestions.
because in the test version, because this apple emphasizes some new functions cannot be used, at the same time there are a few bugs.
apple, code-named Yousemite. The system of the official version will be released this fall. However, early developers can coming in this summer test version.