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Hi All, How can I reset a mac to factory settings when screen doesn't work ? I tried connecting to external screen and used cmd+R, however the external screen never shows the disk utility options Also I dont have the admin lock password, trying to set this up through my existing user account.
 

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If this is a Macbook not an iMac or Mac Pro, Use an external keyboard and mouse, start the computer and immediately close the lid, forcing the computer to use the external monitor. Hold the Command+R keys to get to the Recovery Mode to reload the OS.
If that fails, you can remove the bottom panel of the laptop, and unplug the Video Cable from the monitor to the internal monitor, forcing it to use the external monitor.
 
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