If you're interested in having a Pandora desktop app(sort-of) then keep on reading. It should work with any OS since it only uses Google Chrome and a few extensions to create the app. It's very easy to do so...
Lets Get started:
If you don't already use the best browser ever created then you will need to download and install Google Chrome. It should be quick and painless :)
Now you will need to install the Stylish for Chrome extension. This extension can be used for much more than just Pandora, so make sure to check out all the other styles at http://adf.ly/2506976/userstyles.
Next we install the Full Screen + No Adds Pandora style sheet created by kodayoda713. Now you could stop here and have Pandora open in a tab without adds and full screen...It already looks pretty good at this point
The last thing left to do is create the app shortcut in Google Chrome. So open your now full screen Pandora Radio. Once you are there all that's left is to go to Chrome's Settings/Tools/Create application shortcuts...
You will receive a prompt asking where you want the shortcuts to be placed. Select the places you'll want them and hit "Create"