Comment by Cthulhu_

I'll point to Windows Vista that went all in on this kind of security, even giving you a big warning if you tried to change your background. The computer magazines quickly published guides on how to change a slider or registry setting to reduce the amount of stupid warnings, and the people were quickly trained to ignore and just hit OK on these screens.

Anyway, Apple already does this with unknown apps downloaded from the internet, you need to go to security settings and hit a button there.