This works for both Windows and Mac computers. Swiftkey allows you to add macrons and spellchecks Te Reo Māori.Learn more about Swiftkey. Here are some steps you can try to use macrons without the dictation option popping up. NOTE: this process is only applicable in Outlook application. Or with with the Shift key to type an uppercase macronised vowel. There's a website utility called TypeIt that has its own keyboards for adding these characters. You copy and paste from it. This shows you how to add Te Reo Maori macrons to your Gmail. If you need a Maori language keyboard, tick Maori. 4.