[readthenotes1]

Give this one MS-DOS shell headline would be " why I never am using Microsoft again" or something dramatic like that.

It is a problem in iterm, Apple's overlay, not in the cat program. Program. At least from Reading the article. That's what I got

[rezonant]

It's actually a third party terminal emulator: https://iterm2.com/

[fortran77]

Yes. It’s a Mac problem. That’s why Macs do the worst at pwn2own. It’s compounded by the fact that Mac users deny that there are problems in their beloved OS.

cat is a file concatenation utility. UNIX people know to view text files with more.