Show hidden files in MacOS File Chooser

Today I learned the trick to view hidden directories in macOS File Picker.

Background

I really like Sublime Merge as a git GUI. It’s my go-to when I find myself in a gnarly rebase.

However, while attempting to resolve some conflicts in my ~/.dotfiles directory (which live on github), I was unable to open it (since that directories beginning with a period are considered hidden).

How to reveal hidden files

A little research later, I discovered that ⌘ + ⇧ + . (Command + Shift + Period) is the Mac Shortcut to toggle hidden directories.