Apple documentation says that System Preferences panes should be 64-bit programs, and that in OS 10.6 and 10.7, a 64-bit preference pane is expected to use garbage collection. But for 10.8, they say to use ARC, and recent versions of Xcode don't allow building with garbage collection. How can I make a System Preferences pane compatible with any OS from 10.7 through 10.12?
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