Those rumors of Apple using custom ARM chips for more features inside Macs? They're true... and you might not have to wait long to witness it in action. Jonathan Levin has combed through BridgeOS code that should accompany the iMac Pro, and it looks as if Apple will be using a cut-down version of the iPhone 7's A10 Fusion chip as a co-processor. While its full functionality isn't clear yet, developer Steve Troughton-Smith notes that the A10 appears to handle macOS' boot and security processes, such as passing firmware to the main Xeon processor and managing media copy protection. More importantly, Guilherme Rambo has found references to "hey Siri" support -- as with Cortana on Windows 10, you might not have to click an icon or invoke a keyboard shortcut just to ask about the weather.