Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Netflix Updates Add 1080p On iPhone 6 And iOS8 Support
Netflix on Tuesday issued an update for its iOS app, bringing full compatibility with Apple’s latest iOS 8 operating system and 1080p playback.
Hitting version 7.0 with today’s release, Netflix adds iOS 8 support, but more importantly brings optimizations for the larger screens used in Apple’s latest iPhone 6 and iPhone 6 Plus handsets.
As seen in the side-by-side screenshots above, Netflix now takes advantage of the larger 4.7-inch iPhone 6 screen by displaying more content in video selection menus and search results. Additionally, movie playback controls have been tweaked and no longer obscure one third of the screen.
For iPhone 6 Plus owners, Netflix now outputs true 1080p video, a major improvement compared to past app versions and competing services.
Finally, Netflix says users of Google’s Chromecast will see improvements with the latest update, likely in stream stability.
Netflix for iOS is a free 19MB download from the iOS App Store and Netflix monthly subscriptions start at $7.99 per month.