oh my zsh showing weird character '?' on terminal

Question

I have installed iTerm2 and Oh-my-zsh. However there is a weird question mark that is coming ever since I have changed ZSH-THEME to \"agnoster\".

Attaching the screensho

Answer 1

On Windows - just * download some Powerline font like: https://github.com/abertsch/Menlo-for-Powerline/raw/master/Menlo%20for%20Powerline.ttf
* Install it by clicking the file twice
* Choose the new font in properties
That's it!

On Mac - the previous answer in totally correct, just install and choose an appropriate font.