What is .bashrc on a mac?

you can create it in the same folder as bash_profile..

The answers is simply: Yes, you can and you have to create it if it doesn't exist.

TL;DR; The file is ".bash_profile" preceded by a period

MORE: In your home directory or ~/ there are hidden files (also referred to as "dot files") because they start with a period. They are not visible in finder so that most typical users will never see or interact with them. unless you use a tool like ONYX or it's command equivalent to set them visible "Show hidden files"

You can edit it with this command from wherever you are in your directories nano ~/.bash_profile

OUT OF SCOPE: also if you want to see the other finder hidden "dot files" in your home directory change directory to home cd ~/

Then run ls (lowercase "ell" "ess") for list followed by -la ls -la (these modifier keys are combined lowercase "ell" lowercase "a" preceded by a dash "-l" = in a list format instead of lumped across in a row. "-a" = all entries in the directory.

Read more about ls by reading the manual page man ls

You will see the first item is "." and the second is ".."

These are command reference to the self and parent, respectively. In every directory they exist to point commands places.

If you have atom installed and want to open the folder in atom you could type atom ./ or want to see the contents of the file in Finder open ./

Or, change directory dot dot slash takes you up to the parent cd ../

and can be chained as in ../../../../../ all the way up the hierarchy to root directory

EXPANDED FURTHER: Remember root directory is represented by /

so from where ever you may be in your directory hierarchy aka $PATH you can type cd / and get to the root of your filesystem. much like" cd ~/" will take you to the "root" of the current users home folder

for the best help, read the man pages Happy sleuthing, LF