By default, we can start the OS X system dictation function by pressing the FN key on the Mac keyboard, but there may be a lot of people who don't know that we can do hands-free dictation with voice commands, so let's look at the specific steps.
Step one: Turn on system Preferences, and turn on dictation and voice functions.
Step Two: Check the "Use Tuning Dictation" option, at which point the system will download a 542MB file for offline use and dictation with real-time feedback, otherwise the content of our conversation will be sent to Apple to convert to text.
Step three: Open System Preferences-accessibility-dictation, and check the "Enable dictation keyword phrase" option. The keyword phrase defaults to "computer", we can change it to any text we want.
Step four: To the device said "computer start dictation" can enable hands-free dictation function, after the use of "computer stop dictation" can turn off the function.