Here is WhatsApp design concept for OSX designed with Sketch app. A freebie designed and released on dribbble by Roman Kornikow.
Freebies tagged mac
Today’s freebie by Pixeden is a flat design version of the iMac and Macbook released for free in a PSD vector mockup template.
iMac / Macbook PSD flat mockup
Here’s a free PSD containing the full concept of a mail app user interface. Designed by Aleksandar Djuric.
Free PSD mail app GUI
Today’s free PSD is a contribution from Thom, designer and front end developer from the Netherlands. A Mac finder window, retina style.