Setting Emacs as the default text editor for all files on macOS

brew install duti

duti -s org.gnu.Emacs com.apple.property-list all
duti -s org.gnu.Emacs com.apple.xcode.strings-text all
duti -s org.gnu.Emacs com.netscape.javascript-source all
duti -s org.gnu.Emacs net.daringfireball.markdown all
duti -s org.gnu.Emacs public.c-header all
duti -s org.gnu.Emacs public.c-plus-plus-source all
duti -s org.gnu.Emacs public.c-source all
duti -s org.gnu.Emacs public.comma-separated-values-text all
duti -s org.gnu.Emacs public.data all
duti -s org.gnu.Emacs public.json all
duti -s org.gnu.Emacs public.objective-c-source all
duti -s org.gnu.Emacs public.perl-script all
duti -s org.gnu.Emacs public.plain-text all
duti -s org.gnu.Emacs public.precompiled-c-header all
duti -s org.gnu.Emacs public.python-script all
duti -s org.gnu.Emacs public.ruby-script all
duti -s org.gnu.Emacs public.shell-script all
duti -s org.gnu.Emacs public.swift-source all
duti -s org.gnu.Emacs public.unix-executable all
duti -s org.gnu.Emacs public.xml all
duti -s org.gnu.Emacs public.yaml all

🔗References

• Duti.