My iTunes all of a sudden started to give me this error when I tried to download from iTunes Store. It started when I recently added a new iPhone to my computer and while adding music from iTunes to my iPhone it told me I didn't have access permission to do app updates. It then erased all apps from my phone and started to give the this message each time I open iTunes (iPhone is not connected):
iTunes couldn't download your purchase
You don't have write access for your iTunes Media folder or a folder within it. Change permissions (in the Finder) and then choose Store > Check Available Downloads.
Problem is I've gone through every folder in my iTunes Media folder and every file and folder shows that I have read & write permission. I've also deleted all Apps off my iTunes in the hopes to remove any corrupted or damaged App files from iTunes.
Anyone have any advise on how to fix this?