New ipad 2 and have set up. Downloaded lots of apps today have come to plug into my mac tonight to put onto my ipad some music from my itunes. It automatically sets about syncing all my apps (which i presume will get rid of some and add ones from my iphone that i don't want on ipad?). I tried to stop this process and its telling me if i change settings I will lose all my apps and info (53 of them). I'm prob missing something fundamental but how do i back up my apps to my mac without losing them from the ipad - i need to plug into the mac to put music on form my collection? Please help.