If Apple was legally obligated to contribute back, they would do so.
They have a good history of community contribution (eg. Darwin, WebKit) so I’m willing to give them the benefit of the doubt, instead of some random anonymous internet commenter angst.
I’ve never heard that argument as to why Apple avoids the GPL.
I also don’t see how it is consistent with their behavior. For example, Apple wouldn’t need to change anything to bash to make its latest version run on MacOS. Yet, they don’t ship it.
On the other hand, the argument that they don’t avoid the GPL in general, but specifically GPLv3 because of legal concerns is consistent with their behavior. They shipped the latest GPLv2 licensed bash for years, but avoid any GPLv3 licensed version.
I don't think what you're posting is inconsistent with the observation the person you're replying to made -- Apple is hostile more specifically to GPL 3, which a lot of companies seem to be (rightly or wrongly). IIRC, a lot of GPL-licensed stuff that came with OS X, like bash, just stopped being updated by Apple when it moved from GPL 2 to 3; moving to zsh lets them keep their default shell up to date while also keeping whichever execs/lawyers have decreed "Thou Shalt Not GPL 3" happy.
Also, IIRC, Apple doesn't have a policy of prohibiting GPL-licensed software from being in the App Store, but rather, the FSF's own interpretation of the GPL is that its terms are incompatible with the App Store's terms.
> WebKit is open source software with portions licensed under the LGPL and BSD licenses available here.
Even though those licenses don't require it, Apple still actively develops and publishes enormous FOSS projects. Here's a page that lists more of them: https://developer.apple.com/opensource/
Apple gives back way more than they're legally required to. They don't like the GPLv3 specifically, but's worlds apart from saying they avoid the GPL or that they don't want to give back.
They have a good history of community contribution (eg. Darwin, WebKit) so I’m willing to give them the benefit of the doubt, instead of some random anonymous internet commenter angst.