How To

Di­ag­nose your Mac and re­set its NVRAM

Mac Format - - GENIUS TIPS -

1 Run a di­ag­nos­tic

Power on your Mac and hold down d be­fore the grey screen ap­pears un­til you see Ap­ple Di­ag­nos­tics or Ap­ple Hard­ware Test. If this doesn’t work, try a wired key­board. On some older Macs, you’ll need your orig­i­nal in­stall discs for this.

2 Re­set the SMC

Shut down your Mac. It’s wise then to dis­con­nect all pe­riph­er­als apart from any Eth­er­net ca­ble and your key­board and mouse. Un­plug the Mac’s power ca­ble, wait 15 sec­onds, plug the power in again, wait five sec­onds, then power on.

3 Re­set the NVRAM

Get your hands ready to hold down

ç+å+p+R, then start up your Mac. As soon as you hear the startup sound, hold down those keys un­til you hear the sound a sec­ond time, then re­lease them, and al­low the Mac to start up as nor­mal.

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