On Macs, you can long-press the "u" key and you'll see options for û ü ù ú ū. There's a number underneath, so just long press "u" and then type the number for t

On Macs, you can long-press the "u" key and you'll see options for û ü ù ú ū. There's a number underneath, so just long press "u" and then type the number for the character you want.