How can I change notification sounds?

[Cobra611]

I set up my wifes new MacBook Air last night, and I changed the iMessage notification sound to "Popcorn". I'd also like to change it on my 27" iMac. But, for the life of me (it was very late), I cannot remember where I had gone to do so. Can someone please direct me in the right direction?

 

[cynics]

Not sure if this is what you mean but at the upper left, Messages > Preferences > General (should already be on this screen) > Message receive sound

 

[Crosscreek]

I set up my wifes new MacBook Air last night, and I changed the iMessage notification sound to "Popcorn". I'd also like to change it on my 27" iMac. But, for the life of me (it was very late), I cannot remember where I had gone to do so. Can someone please direct me in the right direction?

Just go to settings>Sounds>Sound Effects.

 

[Cobra611]

Thank you. I've only had my iMac for a few weeks, finally came over from Windows. I didn't have Messages active when looking to make the change. I appreciate the help!