Vietnamese in the latest operating system Mac OS X Leopard. What a surprise! The first time I try to figure out how to type Vietnamese on Mac computer, I realize it fully supports Click on it and choose Simple Telex or VNI. You can notice the little flag on the top right corner.The example below uses Telex typing standard. Most of people prefer VNI, then select VNI. You may also want to check on Show input menu in menu bar for your ease. Go to the tab Input Menu, select Vietnamese Unikey.Go to System Preferences and open International.Follow the steps below to turn Vietnamese mode on, then there you go. As described, no external keyboard driver, no 3rd party software, no need to configure. It is a piece of cake to type Vietnamese in Mac OS environment. What a surprise! The first time I try to figure out how to type Vietnamese on Mac computer, I realize it fully supports Vietnamese in the latest operating system Mac OS X Leopard. Unikey free download, and many more programs.Mac OS X Leopard supports Vietnamese with Vietnamese Typing Input. Source code for the UniKey Vietnamese Input Method is. The core UniKey Vietnamese Input Method is also the engine for many Vietnamese keyboards in Linux, macOS and iOS. UniKey is the most popular Vietnamese keyboard for Windows.