Please note that if you had a heavy crash disk or if want to change your system disk, the Recovery system is not available. From here you can connect to internet even with wifi, access the disk utility and restore your system directly from Apple servers over the internet! You have to start up the device holding "Command + R" and select the "Recovery HD". and rebooted in recovery mode, or it may restore to the factory settings. There is all the detail here : Computers that can be upgraded to use OS X Internet Recovery. If you are sending an Erase Device command to a Mac with FileVault turned on. For device produced arround Mid-2010 to Early 2011, you may have to update the EFI Firmware. Confirm that you want to erase all media, settings, and files. Select your startup disk on the left side of the screen, and then click Erase. Select Disk Utility, and then click Continue.
Reset mac to factory settings command mac os x#
Hold these keys until the Apple logo appears on. As the Mac restarts, hold down the Command and R keys until the Mac OS X Utilities window appears. Enter your password and proceed with erasing data. Finally, press and hold Command-R (the Command and R keys at the same time) to start the restore process. In System Preferences, click on the main menu in the menu bar and choose Erase All Content and Settings. It should work for almost Mac (iMac, Macbook, Mac mini) produced since about Mid-2010. Instead, Click the Apple icon > System Preferences.
If you have no restoration disk, it is possible to restore your Mac over the internet. Restoring an iMac is very easy in fact, if it's not too old device, even if no restoration disk.
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