I have 2 iPhones, 1 iPad, and 1 iPod, I'll sync one, then when I plug another in iTunes says can't sync device, iTunes cannot allocate resources. I then delete iTunes through this tutorial How to Delete iTunes From Mac OS X using terminal. After deleting and reinstalling iTunes I can then sync an iPhone, but then when I try to sync another I get the same run around. I've deleted and reinstalled iTunes about 5 times. Anyone know why. I keep getting this error message?