I admit that I haven’t really been using Macs much lately, but I fondly remember the Ancien Regime System 7 operating system and its distinctive “quack” sound. I think it may have played when you tried to do something (like click somewhere) that the computer didn’t want you to.
Does this sound still occur officially in Mac OS X?
It doesn’t come with any version of OS X that I’m aware of, but it, and the other classic sounds like sosumi, ChuToy, and moof are available. IIRC, I found them all in a package somewhere a couple of years ago.
The quack was an optional alternative to the default system beep. The System 7 Control Panel came with about a half dozen sounds that you could choose from, and of course you could add your own.