Official Google answer: Will it be possible to target an OS in AdWords anytime soon?

Question:

Will it be possible to target an OS in AdWords anytime soon? Would be nice to target OS X users the same way we can target by location, language or many other options. Should be an easy thing to do?

Google's Matt Cutts answers:

Summary of the answer:

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Question

Views

Is there a good way to kick off a feed in Google Reader by doing something like temporarily making the feed include a whole bunch of old content?

334

How would Google consider (and rank) a site that uses meta data and URLs in a language (Italian) and has the H1 of the pages in another (English) considered more appealing for users?

443

What is the best way to serve different content according to user country IP (legal reasons)?

436

With the recent news about website speed being included in the Google metrics, how will Google allow for slow third party ad servers (including AdWords) dragging a site's load speed down?

528

I noticed that, for example, "Texas widget", and "widget Texas" return different results. I think the gist is the same but the results were different. I'd like to include both terms/phrases on my page but wouldn't that be considered keyword spamming?

451