Hidden files
To always show hidden files in Finder on MacOS.
Terminal #
Run the following command in your Terminal:
defaults write com.apple.finder AppleShowAllFiles TRUE
Afterwards type in Terminal:
killal Finder
This shuts down and relaunches finder with this new setting enabled. Now you see them dotfiles!
Finder #
To quickly toggle hidden folders on or off while in Finder, you can use the keyboard shortcut:
Cmd + Shift + .