I hope you enjoyed Saturday’s Mac Riddles, episode 357. Here are my solutions to them.
1: John’s afterword was dropped in 13.
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PostScript
John’s (it was developed by John Warnock and Charles Geschke) afterword (a postscript) was dropped in 13 (deprecated in macOS 12.3, it was removed in macOS 13 Ventura).
2: Painted people who merged with Scots, from QuickDraw to Catalina.
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PICT
Painted people who merged with Scots (the Picts), from QuickDraw to Catalina (the graphics format for QuickDraw, support was largely dropped in macOS 10.15 Catalina).
3: Brisk march for panoramas was lost from X in 2009.
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QuickTime VR
Brisk march (quick time) for panoramas (it introduced many of us to interactive panoramas) was lost from X in 2009 (it was removed from QuickTime X, which came with Mac OS X 10.6 Snow Leopard in 2009).
The common factor
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They are abandoned graphics-based formats. See: PostScript, PICT, and QuickTime.
I look forward to your putting alternative cases.