Gus Mueller wrote a post about software predictions with the hypothetical ARM Macs. Gus is a long-time (and smart) developer that has gone through prior Apple processor changes, so I put a lot of stock in his opinions. The whole post is worth reading, but my big take away was that with the possible exception of requiring sandboxed apps (Gus pegs that at 50/50), the underlying frameworks (and therefore the apps) will remain the same. This isn’t Apple’s first rodeo when it comes to processor changes, and if we get an ARM Mac announcement at WWDC, I fully expect the message will be, "Same Macs, same software, longer battery life.”