Guess what? The no sound problem just happened to me again. (I hope you were sitting down when you read that. If not, we apologize but accept no responsibility.)
Because I’m getting older (again, hope you were sitting down) I didn’t remember what I did to fix the sound problem on my Macbook the last time. However, I still came up with almost the exact same solution.
Googling “mac no sound” got me to a page at Apple.com that essentially treats you like a moron. It doesn’t say “are you sure you turned your computer on?” But it comes pretty darn close.
A couple of links down I found another page on Apple.com filled with suggestions such as “resetting the PRAM”, which I’ve done before and is not physically painful despite the phrasing. Further down in the same discussion thread was a much simpler solution:
Hi. I had the same problem this morning, and guessed that it might have something to do with the mechanical switch that’s built into the headphone socket. I just gently plugged and unplugged a pair of headphones into the socket a couple of time and voila, it worked again.
I did this. It worked immediately.
I refer to Internet/World Wide Web comments as “The Hive”. In this case, The Hive was very helpful. Thank you. Live long and prosper.