That dev is completely and utterly wrong. >He says that you can opt out of code signing and the App Store on Mac because that's a professional OS And this is

That dev is completely and utterly wrong. >He says that you can opt out of code signing and the App Store on Mac because that's a professional OS And this is why he's wrong: it's NOT a "professional OS". My sister has a Macbook Air, running MacOS. She's not a professional (computer user). Mac computers aren't just for "professionals" (esp. software devs), they're sold to anyone who wants something with a bigger screen than a mobile phone or tablet, and wants a keyboard to type on and wants to be able to have a normal filesystem to work with. In short, anyone who still wants to be able to use a normal PC. She uses her Mac for typing documents (she likes to write), watching movies, etc. She is absolutely NOT what I consider a "tech-savvy user". So why does she "need" to be able to opt out of code signing and the App Store? So, no, he's completely wrong. If Apple only sold their computers to software devs, he'd have a good argument, but they don't, so he doesn't.