One of the great things about Macs are the creative professionals tools, one of which is Sketchapp which is native to Mac OSx.
For Folkbot I need to create favicons for the Drupal themes, WordPress themes, Phoenix apps etc etc.
Sketch uses a file format that can be shared via GIT and Frederik Jacques has created a template that does this, create an array of favicons for various devices, Mac, Windows, HTML5 etc. He even has the HTML block for the webpage templates for all devices.
and we now have individual favicons for each device type
I also have icon set for for Android apps from the same base icon created in Sketch
I also do the same for Mac OSx apps
Sketch App is a great tool and thanks Frederik Jacques
I have never had so much fun making icons !