There isn't a genuine version of Visual Studio for the Macintosh--not for OSX anyway. I looked on the web for things advertising to be that, and the only claims I saw were turned out to be some sort of pirated old versions. Visual Studio needs activation, so if someone has hacked the code to break that copy protections, who knows what other hacks are in there? I wouldn't run it on my system.
Are you running a Windows OS through Parallels or a dual boot? If so, you can get the regular version of either Express or Community Edition legally and for free directly from Microsoft.
For OSX, you used to be able to get older versions of Xcode directly from developer.apple.com for free too. Log into apple.com to get a free Apple ID, then use that to log into developer.apple.com and check out the downloads area.
There are some other options for C/C++, like Code::Blocks, Eclipse or NetBeans, but those all depend on compilers being installed as part of Xcode, as far as I know.
Xcode is the place to start, if you're developing on a Mac. Just make sure to get it from Apple directly, and not from some random download site.
https://developer.apple.com/xcode/downloads/