Read more about erase, macOS, mode, operating system, OS X, partition, recovery, reinstall. When the installation has finished the Mac should automatically restart itself and take you to its Setup Wizard which will ask you a series of questions to guide you through initial setup of your Mac. Click the Continue button and then follow the prompts to reinstall the Mac operating system.(The Utilities folder contains a number of utility apps, including some added by developers such as Adobe. If your Mac is running macOS Sierra or newer then click on Reinstall macOS. There’s an easy way to get to the Utilities folder: from the Finder, select Go > Utilities to display all of the Utilities currently shipped with macOS (see screenshot below). Select your Wi-Fi menu and, if needed, enter the password needed to connect to this wireless network. Click on the Wi-Fi menu icon which appears in the upper right corner of the Mac’s screen.You’ll be returned to the main OS X Utilities window.When you have finished erasing the hard drive, click on the Disk Utility menu and select Quit Disk Utility.You will be warned that everything will be removed from the hard drive and that this is permanent. Click the Erase button and follow the prompts to erase the hard drive.It’ll be listed in the left-hand side of the Disk Utility window. Typically the hard drive is named Macintosh HD but yours could have a different name. Click on your Mac’s internal hard drive.Junk removal with CleanMyMac takes only a few minutes. The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. Select your disk in Disk Utility Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility. You could clean it up manually, but using a cleaning app like CleanMyMac X will save you hours on that. From the utilities window in macOS Recovery, select Disk Utility and click Continue. When the process is done, the installer will. Grab your borrowed Mac, head to the Mac App Store, search for Sierra, and click Download. To start, we’ll need to create an ISO file of macOS High Sierra’s installer, so we can load it in VirtualBox on our Windows machine. Click on Disk Utility and then click the Continue button. To make sure Sierra has no troubles installing and works fine after, you need to get rid of system junk on your Mac first. Step One: Create a macOS High Sierra ISO File.When the Mac has completed its startup, you should see a window similar this one:.Your Mac is now starting up in Recovery Mode. Once you see the Apple logo appear in the middle of the screen you can release the Command and R keys.This instructs the computer to startup from the Recovery Partition. macOS Utilities 7) Select Macintosh HD or whatever you’ve named your Mac drive. Select Disk Utility from the list, then click Continue. 6) The Mac boots into macOS Utilities (see image below), listing four options. Turn on the Mac and immediately press and hold down both the Command key and the R key. Select the bootable macOS Sierra installer drive, then press the Return key to boot from the installer drive.
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