Question: I am looking to capture 4k from a Sony a7s. I have a MacBook Air i5 with 8GB ram will this be sufficient? If not will it at least be good enough to capture 1080p 4:2:2?
Answer: You cannot capture 4K under OSX for the moment, the pixel format in 4K is not supported. You can capture 4K under Linux and Windows. You can capture 1080p 4:2:2 under OSX without problems. This MacBook Air has sufficient hardware to capture 1080p and 4K.