For those who still mourn the loss of Rdio, Devin Halladay has a solution. The 19-year-old designer has hand-crafted a Spotify skin for Mac, which brings Rdio’s best design principles to the streaming service that has survived the booms and busts of the modern music industry. You can download the skin over at Halladay’s website, and it requires you to switch your Mac security settings to permit apps downloaded from anywhere. Halladay says there’s some kinks he has to work out, but it should operate like a light mode replacement for Spotify’s desktop app.