https://bugs.winehq.org/show_bug.cgi?id=39718
--- Comment #24 from Austin English austinenglish@gmail.com --- (In reply to mactrix from comment #23)
(In reply to Austin English from comment #22)
I don't think you should be shipping binary dlls from the internet with a Wine package.
Why? In terms of security reasons the same could be said for the Wine package itself, why should the Wine package be save? And what harm can a dll file do on a Mac?
Wine itself is open source, binary dlls are not. Wine (and the dll) can do whatever the user has permission to do. A malicious attacker could make a modified dll that is aware of Linux/OSX and execute specific code for those environments, e.g., to read /etc/passwd, ~/.ssh/id_*, ~/.gnupg, look in ~/.mozilla for saved passwords, etc.
See also: http://wiki.winehq.org/FAQ#head-3cb8f054b33a63be30f98a1b6225d74e305a0459