Question GetKeyDown not recognizing (any) inputs on Mac, where the same code works on PC!?!?!

I'm trying to do the simplest thing; make a capsule jump by pressing space, and I've copied a code that works on my Windows machine. Code is:

void update()
{
if (Input.GetKeyDown(KeyCode.Space))
{
GetComponent<RigidBody>().AddForce(Vector3.up *5, ForceMode.VelocityChange);
}
}

But for some reason, it doesn't seem to register pressing the space bar! Capsule doesn't move at all. In fact, it doesn't seem to register any keys being pressed! I've tried swapping in other keys, but none of them seem to be register. I've also tried to write a debug.log that registers the key press in the console, but nothing is reported while the 'game' is running and I press the assigned key. It seems that Unity is not registering any inputs.

Using 2021 16 Inch MacBook Pro (M1), Monterey 12.3, Unity 2021 3.16f1, Visual Studio 2022 for Mac...

Any idea what I might be missing? Is it a Mac thing? Is there some setting I've not setup right? Is it the code, something in Unity, Visual Studio, or a version thing?

Any help would be wonderful! Also, I'm a total beginner and this is so frustrating because it just worked first try on my PC!

 

Thanks for the reply! Sadly, I transcribed it poorly.. it is in fact capitalized in the code. 'Update' is in yellow.

Any other ideas?