With new everything, new in MacBook Pro, Yes! Apple confirmed that dispatch a classic startup chime from new MacBook Pro, which the feature stayed over a year in Macs. This feature participates for troubleshoot boot issues. The site Windows Clan pointed out on his website, that classic startup chime can do reappearance on new MacBook Pro with the terminal command.
If your system device will carry MacBook Pro, then open the Terminal from Application and command that given below:
sudo nvram BootAudio=%01
Once you have done the job above command, the MacBook Pro reacts nicely once the feature turned on it. Through this you can check hardware diagnostics to test the system component, whether it is working perfectly.
Via: Windows Clan
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