NSButton default button with blueish look

Question

I have a dialog with 1 or more buttons and want to be able to programmatically set the rightmost one be the default one, so that when the user presses the Enter or Return key it

Answer 1

I was missing to set the button bezel style properly and that's why it didn't look properly. I'm now setting the button as this:

[btn setBezelStyle:NSRoundedBezelStyle];

Then any of these work to set the default button:

[myWindow setDefaultButtonCell:[btn cell]]; 

or

[btn setKeyEquivalent:@"\r"]