We are heavy Mac users here at Access Ninja, but one complaint we have is that the Mac gives no audible feedback when you plug in your laptop’s power supply. Luckily the people over at Mac OS X Daily shared this tip that makes your Mac play a tone when power is plugged in just like on an iPhone or iPad. The best part is it only requires cutting and pasting a small line of text from their website into the Terminal app.
Their website has detailed instructions which you can follow here, but if you are already familiar with how to use the terminal just copy the follow text:
defaults write com.apple.PowerChime ChimeOnAllHardware -bool true; open /System/Library/CoreServices/PowerChime.app &