Problems with path using UNIX tools in mac

Hello,
Glad I found this forum....
Well I'm starting using UNIX tools in macOS for bioinformatics (Python....).
I know that in UNIX every installed tools go to usr/bin.... But since in mac I do not have access to it I wanted to know were to create and install tools? Can I recreate a pseudo UNIX pathway?
Right know I install new tool in / but for example boost and then the programs requiring them do not find them...

Sorry for this newbie question and thanx for help.....

What mac are you talking about? (OS and version)

Explain what things you installed and how you installed them, please.

Also, please show exactly what error messages you get.

Greetings

Mac OSx you can find most standard binaries in /usr/bin or /usr/sbin
some programs are launched from /usr/include/program_name.

you should not try to install tools in the root dir " / "

Create your own development directory /usr/local and place you tools in there. You may also want to adventure into the MacPorts land where they place your installed binary tools and updates in /opt/local
gl