I have the Creative Cloud Desktop app downloaded and installed on my iMac (Early 2009/Mavericks OS). When I try to open it I get error -1712. Up until today I have been able to launch it. I cleared out my caches completely today so am wondering if that has something to do with it (cookies?). I can launch other Creative Cloud Apps such as InDesign Photoshop and Illustrator. I am having font sync issues with TypeKit and InDesign as well--typekit says my fonts are synced, InDesign says they are not. Help!
You might try restarting your computer and then attempt downloading Creative Cloud again. In case you still face this issue please share the screenshot.