Brett,
The answer to typing "└" on a Mac is to use Unicode hex input. The page at https://www.webnots.com/how-to-use-unicode-hex-input-method-in-mac/ has a good step by step for doing that and there is a good table of the characters at https://unicode-table.com/
Given all that copying and pasting from the table is best unless you do it often enough to remember the numbers. :)
This may be a stupid question for all you nerds out there, but... how do I type the "└" on a Mac?
Remarkbox