If you’re looking to add the Mac OS X chime start-up sound to your iOS devices, you should check out a new Cydia tweak called BootSound available for free on Cydia via ModMyi repo. Once installed you’re ready to go. Every time your device boots up ( works if you reboot and resrping your device ) you will hear that iconic chime OS X start up sound. The tweak has no options to configure, but you need if your device is set on silent you won’t hear the boot up sound.