Poking around Catalina ...
1) Catalina defaults to zsh instead of bash in Terminal (though you can apparently switch it back to bash if you want).
I don't really know what this means, but what I'm trying to figure out is:
Does it matter whether you use zsh or bash when unpacking the Sigil .txz installer?
Does it matter whether you use zsh or bash for any other ebook-related Terminal things, like java -jar for epubcheck or running KindleGen or Calibre modules from a Terminal window?
2) Catalina includes Python 2.7.16.
As 2.7 is reaching end of life, if I install Python 3, will that screw up anything I have that requires Python 2 to run? From what I've read, I can have both 2 and 3 installed, but how do I point to one or the other at will? Or will the script or process know which one it needs and pick the correct one automatically?
It's probably obvious that I don't know what I'm talking about here. I'm not doing any programming. Just running Python scripts and apps and want to make sure I can keep running them.
Thank you!