I used Chinese Pinyin which Mac built-in, it sometimes lagging when typing. I used to use Google Pinyin when I used Windows last time. But I couldn’t find the Google official release of Google Pinyin.
However, now I had found it! Here is the downloadable link: Google Pinyin for Mac download link (zip file)
Now I can type Chinese characters faster like a running leopard without lagging.
After some tries, my whole macbook crashed because of high ram utilization of Google Pinyin and Google Chrome… So, I could only use back the Mac built in Pinyin.