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I don't use macOS so am unaffected, although I would think that they shouldn't need to support PostScript in the Preview. PostScript is not that good format for publishing and documents anyways (for, among other reasons, security), but it is good as a programming language.

I still do often use PostScript, but I have Ghostscript and the graphical output of the program (if it has any; some of them don't) can be made in many file formats, including PNG, PDF, PCL, etc (it doesn't have SVG output, although that might be helpful if you are making diagrams).

(There are some features I think would be good to add into PostScript, such as alpha transparency, auto-allocation (by specifying null where the object is expected; this is most useful for readline, in case you do not know the length of the input), a "unread" operator (like ungetc in C), being able to specify encodings separately from fonts, and others. Some features are in Ghostscript and are good to have, such as ARGUMENTS and %pipe%, and I do commonly use ARGUMENTS.)

(PDF isn't good either though, but at least it is a format for publishing and documents, despite its problems.)




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