I’m updating resources on the Penn State Computing with Accents Chinese page, and was looking for new resources. One was a YouTube video from “geekannex” shown below.
It goes through the installation and activation of the Chinese input utitlies, then explains to use the pinyin option to type in Roman letters and then have it be converted to Simplified Chinese (a phonetic option is also available for Traditional Chinese and Japanese). It’s for Windows XP, but truthfully the process has not changed much since then.
And yes there is one for the Mac from “rohanr2”.
FYI – Mac SnowLeopard now has a “Trackpad” option which uses handwriting recognitiion, but since I haven’t done any research (yet), I can’t tell you if it’s worthwhile or not. You can always look at YouTube for video demonstrations.