If you'd rather not use your own voice to narrate a video, you can use a Mac-generated synthesized voice instead. The best way to do it is to use a simple Terminal command to create the audio file and then bring that into iMovie.
Want to know more about how to use iMovie on your Mac? Check out this MacMost course!
What a fabulous tutorial! I have been looking for something like this.
Much thanks for this useful video, Gary.