No sound coming through Mac when Microphone is plugged in. (On Garageband)

I have plugged in my RØDE microphone to record something and the sound levels indicate that noises are being made and everything but when I go to play it back nothing is coming out of my speakers. I tried playing something on youtube and sound is coming out fine. Nothing plays on Garageband. I have checked my inputs and outputs in settings and changed everything the way it should be. Even tried putting in earphones to see if anything would change and nothing did.