If your boot hard drive is Recovery, for instance, click on the hard drive marked Recovery and select "Repair Disk". Select Disk Utility from this window and hit "Continue".įrom the Disk Utility window, select the First Aid tab and then click the icon of your boot hard drive. You will see only a very basic OS X interface with the OS X utility window. To get access to the Recovery HD volume, restart your Mac while pressing the Command and R keys until the Apple logo appears. To restore Mac with the help of Recovery HD, follow these steps: Part 2: How to Restore Mac with the Help of Recovery HD But, for this method to work, you need to be connected to the internet. Using this feature you can download your desired version of the OS X over the internet without requiring any kinds of the optical disk. This is also a great feature provided by the Recovery HD. recovery HD will also let you search for troubleshooting info over the internet as well as remove the contents of the hard drive and restore it from a Time Machine back up. This feature can be used to repair the hard drive of your Mac once you select the "Repair Disk" option. Time Machine keeps backup of a day, a week, and even a month but when the backup drive becomes full, the oldest backup will be deleted to make more space for the new backups.ĭisk utility is one of the main options offered in the recovery mode. Time Machine keeps a track of how your Mac performed on a particular day so that users can restore Mac to any desired day in the past. Time Machine has a unique backup feature in OS X. The Recovery HD has the following features: 1. Part 1: What Recovery HD Could Help You to DoĪs mentioned earlier, Recovery HD contains essential diagnostic and troubleshooting tools that help users fixing his Mac if anything goes wrong. Part 3: How to Troubleshoot Recovery HD Problems.Part 2: How to Restore Mac with the Help of Recovery HD.Part 1: What Recovery HD Could Help You to Do.Quit Terminal and safely eject the USB drive.When done, the USB stick will have the same name as the installer, such as Install OS X Yosemite. Wait for Terminal to finish creating the bootable installer.Tap "OK" if an alert says that Terminal wants to access files on the removable volume.Type Y and press Enter to confirm that you want to erase the volume.Input your password and press Enter again.(e.g., to install OS X Yosemite in a USB drive named MyVolume) sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ Yosemite.app Type in the command below and hit Enter.Open Terminal from the Applications folder.Choose the format as Mac OS Extended (Journaled) or OS X Extended (Journaled) and the scheme as GUID Partition Map.Select the USB drive from the left side and click Erase.Plug in the USB flash drive you prepared.Open Disk Utility from the Applications folder.(Open InstallMacOSX.dmg, then double-click on InstallMacOSX.pkg to install the "Install OS X " app to your Applications folder.) Get the installer from the downloaded image.(Open Apple's page, copy the link address of your preferred installer, and then paste it to Safari to start downloading.) In that case, you need to reinstall the operating system using a bootable USB installer. If your Mac was produced in early 2011 or earlier and runs Mac OS X 10.7 Lion or later, it doesn't have Internet Recovery in its ROM. If that doesn't work, continue with step 2. Otherwise, you reinstall the OS that came with your Mac or the closest available version. If you upgraded to macOS Sierra 10.12.4 or later, you get the latest macOS version compatible with your Mac. Try clicking Disk Utility to erase your startup disk again, then tap on the "Reinstall OS X (macOS)" option to reinstall macOS/OS X. When Internet Recovery is loaded, you will see the OS X Utilities window. Restart your Mac, then immediately press and hold Command Option R until the spinning globe appears. If your Intel Mac is manufactured from late 2011 onwards and runs Mac OS X 10.7 Lion or later, you can utilize Internet Recovery without extra software. To drive your Mac to search for an updated reinstall certificate online, you need to switch to Internet Recovery, which starts with a built-in ROM that allows your Mac to connect to the internet and download recoveryOS and bootstrap reinstalling OS X. That's likely because your laptop's certificate for Mac OS X reinstalls has expired. Suppose you can't reinstall macOS with Command R, which starts your Mac from the built-in macOS Recovery System. Step 1: Restart in Internet Recovery Mode. Reinstall OS X from a bootable installer.Check your startup disk's SMART status with Disk Utility.
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