Performing a factory reset is a bit more implicated on an iMac now because of a hardware omission setting in it. The device is no longer equipped with a built-in optical disc drive. Even if you have the OS reinstallation DVD, it won't do you anything unless you have an external optical drive connected to your system. Restarting or rebooting iMac to its Factory Settings cleans the entire contents of its memory, including stuff you copied to the clipboard. For this, you can also take technical support assistance from Apple iMac factory reset page that helps you reboot iMac to its defaults settings in a competent manner.

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For rebooting iMac to Its Factory Settings, you can also contact a third party support providing company, like Intelli Atlas and get quality support from Apple technicians accordingly.  

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In iMac, a special form of memory called nonvolatile RAM, or NVRAM, stores your Intel startup settings. If you reboot your system its factory settings defaults and perform an NVRAM reset. To restore your iMac to its original state configuration, you can prepare the system for resale or reassignment, reboot your iMac and use the Recovery system built in option in the Mac OS to return the computer to its factory settings. For this, you can also visit iMac reset page and get help from certified Apple technicians on rebooting iMac to its factory settings.

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There are two methods to reboot iMac to its factory settings:

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NVRAM Reset

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• To factory reset, your iMac simply opens the Apple menu and Choose “Restart." By this a dialog box appears, asking you to cancel or restart the process. If you allow the timer, your iMac restarts automatically.

• After this press and hold the "Command" and "Option" keys, along with the letters "P" and "R" before your monitor displays a gray screen.

• Lastly, continue holding down the above-mentioned four-key combination until your system chimes and restarts again. Now, release the keys and allow your iMac to finish restarting.

 

After this NVRAM reset process, your iMac may lose track of your disk or drive. To resolve these problems, simply open the Apple menu, choose “System Preferences" and select “Startup Disk" from the System group. If the above-mentioned steps are not helpful in rebooting your iMac, you can dial a toll-free Apple support number and get quality help from the certified Apple technicians.

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OS X Recovery

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Open the Apple menu and opt for "Restart." By this, a dialog box will ask you for cancel or restart the process. If you allow the timer, then your iMac reboots automatically.

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After this, press and hold the "Command" and "R" keys.

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Now tap on the "Disk Utility" option in the Mac OS X Utility window that appears after your iMac reboots.

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Tap on the "Continue" button> Launch "Disk Utility" from the set of options >Switch to the Erase tab.

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Finally, rename your startup disk, using the default "Macintosh HD" label. Tap on the "Erase" button to begin the process. If these steps are not helpful in rebooting your iMac factory settings, then contact Intelli Atlas technical Support Company certified technicians to resolve the issue.