No disrespect meant, but there is no way you can know this to be true.
Oscar Wilde converted while on his deathbed. The late Mr. Jobs may have done the same, or he may have converted at some other time. Certainly neither you nor I have any idea what his spiritual status was at the hour of his death, and I see no profit in speculating about same.
Each of us will soon stand before the Just Judge and render an account of our lives. If I may venture an opinion, I think that my time is better spent trying to be ready for my own judgment day rather than trying to guess how someone else will fare at theirs.
There is some wisdom to what you said, but as I think about it, we can find out that people such as Oscar Wilde converted to Christianity based on some evidence, otherwise how do we know that the conversion actually happened?
By the same token we can certainly deduce (although not 100%) whether Steve Jobs accepted the Saviour.