alt Hacker NewsThat surprises me; I assumed they dropped the last pre-Darwin code when they discontinued the classic environment. What remains that's that old?
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pcwalton • today at 8:47 PM
Pretty sure the menu bar was Carbon in Snow Leopard, which was the same release that discontinued Classic. Lots of Cocoa widgets called into HIToolbox under the hood. QuickTime wasn't fundamentally changed. And iTunes of course was Carbon code for a very, very long time.
I seem to recall years ago reading that the Cocoa (the NeXTstep derived API) menu code called into the Carbon (the classic Mac OS derived API) code to run stuff. But that was around Snow Leopard IIRC. That sort of stuff might still be around?
The Carbon API itself lasted until 10.15 (Catalina / 2019) for 32 bit apps, so there's presumably at least some classic Mac OS derived code in there until then.