But this feature required an Internet connection and worked for only brief periods of time-about 30 seconds-before your Mac stopped listening to your speech and headed off to Apple’s servers to have your words transcribed. You pressed a key combination (by default, the Fn key twice) and started talking to your Mac, and it recorded and transcribed what you said. One of the features in OS X Mavericks that I was most looking forward to was offline dictation.īack in OS X Mountain Lion, Apple added the systemwide Dictation tool, similar to Siri in iOS.