Could those wise people out there help me with some things to do with Apple and GPL licenses in OS X? Apple have used GPL code in Mac OS X, right? by my understanding under the GPL license you can take the code and change it but you have to release it back to the source. If the source regects it then you can use it to do what you want but must keep it under GPL license. What Apple are doing is re-releasing it under their own open source license, right? It is not completely free (as in freedom here) as it was before. They are making it available but with more restrictions. It has lost the GPL license and the good will of the open source community. Not all open source stuff is free (money free) but is still free (freedom free) where people still have full access to it and don't start stealing code from GPL licenses and claiming it as their own without giving it back to the source or anything. By stealing code (such as Spaces and Time Machine, which have apparently been around under GPL for years) are Apple breaking the law and could they be sued in a court if people actually took the time and money to sue them? This is the view that a good friend of mine has, a Mac user himself, but who has become very disgruntled by Apple by their abuse of the GPL license. I'm unsure of the whole situation and don't totally understand it. Could anyone help me understand this and fill me in on all the details? Any background knowledge and correct knowledge would be greatfully received! Thanks!