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| + | [title] PRAM/NVRAM Reset |
|---|---|
| + | [* black] Shut down the computer |
| + | [* black] Press the Power button |
| + | [* red] Before the grey color screen is shown, press and hold Command + Option + P + R keys simultaneously. |
| + | [* black] Hold down these keys until the MacBook restarts and then you will hear the startup sound. |
| + | [* black] Release the keys. |
| + | [* icon_note] Once you have reset PRAM/NVRAM, keep in mind that settings like disk caches, volume, time, keyboard and mouse preferences, will also be reset. |
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