02012-02-05T00:31:59+00:00 Apple obligingly allows you to browse and download the open source software they use in OS X. Since they have listings for each version of OS X, I decided to take a look at how much software they were using that was only available under the GNU public license. The results are illuminating: 10.5: 47 GPL-licensed packages. 10.6: 44 GPL-licensed packages. 10.7: 29 GPL-licen