Apple has begun sending out notices to some iTunes and App Store customers advising them of some upcoming payment security changes that will limit compatibility with older iOS, macOS, and Apple TV software versions. The emails appears to have been sent out only to those users that Apple has identified as still using one of the older versions, and specifically notes that users of iOS 4.3.5 or earlier, macOS 10.8.5 (Mountain Lion) or earlier, and Apple…