Earlier we reported that Apple has disabled the start-up chime in the new MacBook Pros.
Well, after some digging, we found this article on how to re-enable the chime.
- Open up a Terminal Window (Finder > Applications > Utilities > Terminal).
- Type in the following: sudo nvram BootAudio=%01
- The computer will ask for the systemwide password. Type it in when asked.
- Close the Terminal window.
- That’s it. The boot chime is back!