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A comment on Apple starting to alert users that it will end 32-bit app support on the Mac. Parent comment

Re:Apple starting to alert users that it will end 32-bit app... by Someone on Thursday April 12, 2018 @07:11AM (#16819636)
When x86_64 was introduced, other 64-bits systems had made that choice, too. It was natural to follow that.

See http://www.unix.org/version2/whatsnew/lp64_wp.html and http://www.unix.org/version2/whatsnew/login_64bit.html.

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Re:Apple starting to alert users that it will end 32-bit app... by adrianmsmith on Thursday April 12, 2018 @08:13AM (#16820019)
A counter-example (the only one I’m aware of) is tru64 UNIX from Digital (later Compaq, later HP), now EOL. If you used “int” in C on that platform, it was 64-bit.
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