Getting started
> System folder
on’t start to panic: chances are it’s a minor and easily fixed issue that you can sort out yourself. Press and hold the power button for 10 seconds to ensure your Mac is turned off and then restart it while holding down Cmd-Opt-p-r. This resets the non-volatile RAM (NVRAM) that your Mac uses to store basic settings. Keep the keys pressed until you’ve heard the startup chime twice. No luck? Restart again but this time hold down Cmd-r. This will launch the
