The team behind Tumblr’s success are very, very smart. They know good and well what it takes to run the hype machine and keep it running full-speed. Because of this, they’ve decided to release a Tumblr desktop app today. They’ve decided to release this app for OS X Yosemite exclusively. That’s OS X 10.10 only. They’ve done this because they know there’ll be massive amounts of people looking for new an exciting ways to use their brand new operating system this afternoon.