My Emacs is frequently up to date by Homebrew together with different apps. How do I robotically add Markdown file identify extension to its plist file (/Functions/Emacs.app/Contents/Information.plist) so Emacs seem within the listing of apps within the Open With menu for Markdown information?
<dict>
<key>CFBundleTypeExtensions</key>
<array>
<string>markdown</string>
<string>md</string>
</array>
</dict>