![]() ![]() Launch the macOS Mojave installer if it isn’t already running. If you’re performing an upgrade install, that is, installing macOS Mojave on top of an existing Mac operating system on your startup drive, you should be ready to begin. When you’re finished with Disk Utility, select Quit Disk Utility from the Disk Utility window.įrom the macOS Utility screen, select Install macOS, then click or tap the Continue button.įrom here until the system setup process, the installer for upgrade or clean works the same. You can use the instructions in How to Use macOS Sierra Disk Utility to Partition, Erase Drives for erasing a drive. If you’re performing a clean install, the usual name for the startup disk is Macintosh HD, though it may be different if you’ve customized the startup drive name, or are performing a clean install on a different volume. Make sure you select the correct volume in the sidebar. Select the Disk Utility option, then click or tap the Continue button.ĭisk Utility will launch. Eventually, you’ll see the macOS Utilities screen. The startup process can take a bit longer than usual, depending on how fast the USB device is. Your Mac will start from the bootable installer. When performing a clean install, use the Disk Utility option to erase the startup drive, and the Install macOS item to install Mojave on the empty startup drive. Select the USB bootable flash drive from the icons, and then press the return key on the keyboard. Keep the Option key depressed until you see the boot manager appear, displaying icons for all the disks you can start up from. Restart the Mac while holding down the Option key. Insert the USB bootable flash drive you made earlier into your Mac, and make sure it successfully mounts. Warning : This process will completely erase your startup drive, causing all data stored on the disk to be lost. It goes without saying, but I’m going to say it anyway: Performing a clean install on your startup disk requires a few extra steps, including starting up from the bootable installer you made earlier, and completely erasing your startup drive. If you’re ready to begin the install, I’ve broken the process into two sections: an Upgrade Install and a Clean Install. Before you proceed, be sure you have an up-to-date backup of your Mac. You won’t need a bootable installer if you’ll be performing a clean install on a non-startup disk.Įven if you don’t need the bootable installer, it’s a good idea to create one, as a way to archive the installer as well as to make installing macOS Mojave on multiple Macs an easier process.Īt this point, you’ve acquired the macOS Mojave installer from the App Store, and are almost ready to perform a clean or upgrade install. You’ll need the bootable installer if you intend to perform a clean install on the startup disk. The above guide also contains information on creating a bootable macOS Mojave installer. You can find instructions for downloading the installer, as well as information about which Macs are able to run Mojave, plus some tips on common problems and how to avoid them, in the Rocket Yard Guide: How to Download macOS Mojave and Avoid Common Problems ![]() ![]() The macOS Mojave installer is available from the App Store. Start by reviewing these guides to make the process an easy one: Mac 101: How to Get Ready for macOS MojaveĪnd while it’s unlikely you’ll encounter any problems while installing, this Rocket Yard Guide may help you solve a problem, should one occur: Mac Installation Errors You May Encounter and How to Fix Them We’re going to show you both install methods, although we’ve combined them, since most of the steps are the same.īefore you begin installing Mojave, there are a few things to do to ensure your Mac and you are ready for the new operating system. ![]() When the clean install is complete, you’ll have a pristine startup drive, reminiscent of when you first got your Mac. This method completely erases all of the data on the startup volume and replaces it with the macOS Mojave operating system. The default is an upgrade install, which will update the version of the Mac operating system currently on your startup drive to macOS Mojave, while retaining your user data, apps, and other assorted information you may have stored on your Mac. When you’re ready to install macOS Mojave, you’ll need to choose between two different install methods. ![]()
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