I wouldn’t really call them proper PSD’s, but Apple has released a Photoshop PSD files for its latest models of iPhone, the iPhone 6 and iPhone 6 Plus.
If you just need some simplistic images of the devices to add in marketing shots, that is all you will be able to do with them. They’re more for mockups than they are proper development as Apple doesn’t want people moving other elements around, presumably to keep integrity in the design intact or something like that.
Anyway, you can download the PSD files here from the Apple site.
