After upgrading to OSX Yosemite, i'm unable to test my iOS app on my device.
Compilation and packaging works as expected but app is never installed on my device connected trough USB.
Anyone having the same problem?
I've found the solution on another post (Re: Run/Debug on a device with Flash Builder 4.7 on OSX 10.9 (Mavericks) and iOS7) having app installation problem on Mavericks.
Disable your device WiFi and install your application from Flash Builder. Then enable your device wifi. It work for me.