You can also try the cloud platforms to take your backup. Once done, you need to keep the downloaded file in an external hard drive to use it later on for the re-installation of macOS. Step 1. Make sure that internet connectivity is good enough and it is connected to your Mac. Step 2. First off, click on the Apple menu at the top left of the screen and choose Restart. Step 3. Next, your macOS device will enter the Recovery mode. Step 4. Up next, choose your Startup Disk and click on the Erase tab located at the top of the window.
Step 6. Click on Erase to start eliminating everything stored on your device. In the end, quit the Disk Utility from the drop-down menu in the top left corner of the screen to return to the OS X Utilities selector. Once your device reboots, Mojave will be live and running on your computer.
Ensure that your Mac is connected to the Internet. Then, you need to connect the bootable hard drive made with Mojave to your Mac. Now, click on the Apple menu in the top left corner of the screen and choose Restart from the drop-down menu. Next, you need to hold down the Option key while your Mac is restarting. Now, you will get the option to choose a startup disk. Choose your bootable drive with macOS Mojave from the startup disk options.
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Now, macOS Mojave will start installing on your Mac. Hit Continue on the macOS Mojave installation window and then agree to the licensing terms and conditions. Now that you have reinstalled Mojave on your Mac, restore all the settings along with the files from the earlier macOS Mojave Time Machine backup. Click on the Apple menu at the top left of your Mac screen and choose Restart.
Make sure to hold down the keys till your Mac reboots. Disk Utility will launch and display the drives available to your Mac. You are about to erase your Mac's startup drive. Make sure you have a current backup before proceeding. You will be asked to confirm that you really, really want to erase your startup drive. You do have a current backup, right?
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Click the Erase button to proceed. Your startup drive will be wiped clean, enabling you to perform a clean install of OS X Mavericks.
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The installer will display a list of drives attached to your Mac that you can install Mavericks on. Select the startup drive you erased in the previous step, and then click Install. The Mavericks installer will start the installation process, copying the new OS to your startup drive. The process can take a bit of time, anywhere from 15 minutes to an hour or more, depending on your Mac and how it's configured. So relax, grab a coffee, or go for a walk. The Mavericks installer will continue to work at its own pace.
Step 2: Back up your Mac
When it's ready, it will automatically restart your Mac. Once your Mac restarts, proceed to the next page to complete the OS X Mavericks initial configuration process.
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Once the OS X Mavericks installer automatically restarts your Mac, the bulk of the installation process is complete. There are some housekeeping chores to be performed by the installer, such as removing temp files and clearing out a cache file or two, but eventually you'll be greeted by Mavericks' first-startup Welcome display. Because you're performing a clean install of OS X Mavericks, you'll need to run through the first-startup setup routine that configures some of the basic preferences needed by the OS, as well as create an administrator account to use with Mavericks.
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He is the president of Coyote Moon, Inc. Updated December 18, A backup of your current startup drive. This can be a Time Machine backup or a clone of your startup drive. We're going to start the process by taking care of two preliminary tasks that must be performed. Since the clean install process will erase all of the data on your startup drive, we must have a current backup before we can begin.
I recommend performing a Time Machine backup and creating a clone of your startup drive. My recommendation is based on two things, First, I'm paranoid about backups, and prefer to have multiple copies for safety.
And second, you can use the Time Machine backup or clone as the source for migrating your user data back to your startup drive after OS X Mavericks is installed. From the menu bar select Utilities, Disk Utility. Click the Erase tab. Click the Erase button. You'll be returned to the Mavericks installer.
The Mavericks licensing terms will display. Read through the terms, and then click Agree. In the Welcome screen, select the country where you will be using the Mac, and then click Continue. The choices are: From a Mac, Time Machine backup, or startup disk From a Windows PC Don't transfer any information If you backed up your data before you performed the clean install, you can select the first option to restore your user data and apps from a Time Machine backup, or from a clone of your old startup drive.