MacOS - how to accentuate the words

Well, when you want to accentuate and not have a special keyboard, you need to use this short keys:

For letter with ^ = option + i and letter

For letter with ~ = option + n and letter

For letter with ' = option + e and letter

For letter with ` = option + ` and letter

For letter ç = option + c

But if you want to do different, go to System Preferences/Language and then select Text/Input sources, after check the box for US International PC. If you don't use multiple keyboard, delete the others keyboard from list and clear the box for Show Input Menu in Menu Bar.  

Voalá, you ready to use! :))