What is the Mac app signature?

[Martin Baxter]

Tiemo Hollmann TB wrote:
> Hello, beeing new to Mac development, I don't know what to put into the
> signature in the standalone settings of OS X instead of the ????. Everything
> I put into it, was again replaced by the four ????. I thought it would have
> been something like my company name, but obviously it must be a special
> syntax or content.
> 

its a unique 4 character signature that identifies your app:
see <http://developer.apple.com/datatype/>

> And could perhaps someone explain to me in short words, what the info.plist
> and PkgInfo files are for on Mac? Are they necessary to start the
> application or just for "info" purposes?
> 

Pass. I'll let someone more knowledgeable answer that one.

Martin Baxter