[ericmason]

“Cerebro.app” can’t be opened because it is from an unidentified developer. I'm really curious why developers release software without signing it. The Mac developer account and code signing certificate seem like a small cost if you're releasing software you actually expect people to use. Personally, I see that warning and assume the developers aren't serious and/or don't care about their users and delete the software.

[FreakyT]

Personally, I support developers not signing apps out of principle.

Gatekeeper on Mac OS, while ostensibly a "security" restriction, is nothing more than a blatant money-grab by Apple.