For an updated version of these steps, check out the iFixit PRAM wiki

Video Instructions

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Ayrton Fineout

Member since: 02/22/2017

1,375 Reputation

2 Guides authored


I want to know how to how fix mac apple system

Sheftech computers - Reply

When I do it, it goes straight to Mac OS Startup Disk Repair… I badly need a PRAM reset!

Stephen Quast - Reply

Verify that your keyboard works. If it does not then plug in a USB keyboard and hold the same keys on startup.

Ayrton Fineout -

The preferable procedure and hold the keys down until you have heard THREE startup tones.

This is dependant on the age of your MAC.

Very early models have a button switch soldered to the logic board as well.

Mal - Reply

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