I'm aware of this feature however at present I don't see what advantage it gives you, so I found the following description on the internet: "When you have multiple desktop spaces, most apps that are launched in a desktop space are dedicated to that space. For example, if youre working at a coffee shop on your MacBook Air, you can have one desktop dedicated to Mail so you email is accessible immediately, and you can have a second desktop with a presentation you are creating in Keynote. You can switch between the two spaces when you need to do work in a certain app. (But some apps, like Adobe Photoshop CS5, don't behave when it comes to multiple spaces.)". I still don't understand the benefit of this so maybe someone could clarify, please? What's the difference between creating extra desktops to house each running application and just having applications open on one desktop? You're still switching between things either way aren't you? Or am I totally missing something!? Thanks.