Language & Region, you will find a list of 'Preferred languages.' Chinese is automatically added to this list when you install the Chinese input methods, but you can also add to the list and arrange it manually. Another addition in Mavericks/Yosemite is the new Simplified Chinese–English translation dictionary (Oxford Simplified Chinese–English Dictionary) for the Dictionary app, which also works with the Look Up feature in OS X.This new feature alone makes upgrading to Yosemite from Mavericks a good idea. Yosemite takes an additional step, introducing 'context-based Chinese input methods,' which take the emerging context of the sentence into account in choosing/ordering suggestions/candidates as you type.Mavericks introduced better dictionaries for the Pinyin input methods, better trackpad handwriting (tolerates poor or nonexistent stroke order), and better support for mainland Chinese social media, search, and email.Mavericks introduced two new Chinese font families, for a total of ten since Mountain Lion, plus five new TC fonts within the Kaiti and Songti families.Mavericks and Yosemite are similar with regard to Chinese, with ongoing improvements built upon the changes introduced in Mountain Lion. All Apple computers that can run OS X 10.9 Mavericks can run OS X 10.10 Yosemite.Chinese in OS X 10.10 Yosemite What's New
