"As you know, Microsoft eventually kind of grabbed the gold ring out of Apple's hands, I guess"

In this quote, Andy Hertzfeld is referring to the rivalry in between Microsoft and Apple in the early days of the computer market. He is saying that Microsoft had the ability to exceed Apple and end up being more successful, signified by the phrase "got the gold ring." This could be interpreted as Microsoft attaining more market share, earnings, or general supremacy in the market. Hertzfeld also adds the expression "out of Apple's hands," suggesting that Apple had the chance to attain this success but was not able to keep it. Making use of "I guess" at the end suggests a sense of resignation or approval of this outcome.