“Adium” is an application which was downloaded from the Internet. Are you sure you want to open it?

I'm regretting choosing Mac as my laptop at Google. I thought it would be cool to learn something else than Linux. I thought it would be a nice to see that famous user friendliness. Instead, I get this annoying message about Adium, that is part of the company default image. And the only way to remove it is opening the command line, and typing:

find /Applications/Adium.app/ -print0 | sudo xargs -0 xattr -d com.apple.quarantine

Is this the new, fancy Mac? I feel right back home. And ten years younger.