iTunes cannot sync photos to the iPhone “********'s iPhone” because your Photos Library is not yet available. Please try again later. Have been receiving that message for SO long. Whenever I try to sync my iPhone, I'm practically holding my breath that THIS TIME the photos will actually sync. I've not found fix for this issue, anywhere. Would love if someone had some thoughts? Not 100% sure if it was happening before I upgraded to El Capitan Public Betas but, I'm 99% sure it was. Thanks!