clean install mac os sierra external hard drive

#Clean install mac os sierra external hard drive how to
#Clean install mac os sierra external hard drive download

Once the app opens, make sure that it is selected in the left. Step 2: Connect the aforementioned USB flash drive to your Mac, and then launch the Disk Utility app to format the connected flash drive. The app will be titled, Install macOS High Sierra.

#Clean install mac os sierra external hard drive download

Notice: Remember to replace with the name of your installer disk. Step 1: To begin, download macOS High Sierra 10.13 installer app from the Mac App Store. Sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/ -applicationpath /Applications/Install macOS High Sierra.app

Type, or paste, the following command into Terminal, where is the name you gave the installer drive when you formatted it:.

Launch Terminal either by searching for it in Spotlight or navigating to the Utilities folder in Applications.

When it’s finished, click Done and close Disk Utility.

Give the USB stick a name, then click Erase.

Click the Erase tab and make sure Mac OS Extended (Journaled) is selected in the format tab.

It’s a good idea to use a USB stick to put the bootable installer onto. Next, open a Finder window, navigate to your Applications folder, right-click (or Ctrl-click) on the macOS 10.15 installer, and.

Plug in the USB stick and launch Disk Utilities. At the Terminal command prompt, type sudo followed by a space.

The installer will remain in your Applications folder. As soon as it does, select File and Quit (or keyboard shortcut Command-Q) so it doesn’t install.

When it’s finished, the installer will launch.

Download macOS High Sierra from the App Store.

Do not click on Home as you don’t want to install on your main drive. Get the right tools for clean installing Apple's operating system.Ĭlean Install Of High Sierra On New Ssd Create a bootable macOS installer Next, and this is important, click on Show All Disks. Backup your Mac to ensure your personal data is intact.Your Mac deserves a fresh start.

To format a USB drive launch Disk Utility (Finder -> /Applications/Utilities/Disk Utility). First, make sure your USB flash drive is formatted and named as Untitled. Create a bootable flash drive with macOS Sierra. If you want to a fresh copy of Mac OS High Sierra instead, clone a copy of a fresh. Step 3: Clean Install macOS Sierra on your startup disk 1.

But if you plan to clean install on a non-startup drive (you have and extra HDD or SSD on your Mac), you don't need the USB. Use SuperDuper to clone your existing copy of Mac OS to the external drive. Make sure the Name of the HDD remains Macintosh HD, and that Format selected is Mac OS Extended (Journaled). Or use the OS X installation disc that came with your machine or buy a new one to. Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from. This flash drive is only needed for a clean install on your Mac’s startup drive. Step 5: When Disk Utility is loaded, make sure that the main Mac hard drive is selected from the left hand side, and then click on Erase button. Install macOS or OS X from Internet Recovery Mode, which you can boot into by holding option+command+R while your Mac powers up. Take a 16GB or larger USB flash drive to create a bootable Sierra installer.The install might take 30 minutes to an hour, then the new user setup, and you should be all set. Choose the volume that you just created for a destination, and Continue. My existing startup drive is in bay 1, and the formatted but empty SSD is in bay 2. Should complete in a few seconds, so you can quit Disk Utility, then continue on with Reinstall macOS. Question: Q: Installing High Sierra on new SSD drive I added a new SSD drive to my mid-2010 Mac Pro, and want to do a clean install of latest OS, but keep hitting snags.This is the drive that you wish to format and make the clean install onto. 7) Select Macintosh HD or whatever you’ve named your Mac drive. Select Disk Utility from the list, then click Continue. Apple has some issues still with the new APFS file system. 6) The Mac boots into macOS Utilities (see image below), listing four options.

#Clean install mac os sierra external hard drive how to

Follow this guide: How to create a bootable macOS Sierra installer drive As for installing High Sierra I would hold off for now. 4 You will find the installer in the Applications folder. dmg file has downloaded, open it, then click on InstallOS.pkg, and follow the onscreen instructions. A file named InstallOS.dmg will download. That way you can swap the drives and then install a fresh copy of the OS onto the new SSD. I cannot boot from my HD so I tried to open MacOS How to Fix Common Download Errors for macOS Catalina Downloading the installer is the first step of the. Creating a Bootable Install Drive 1 Go to 2 Click on macOS Sierra.

The trick is first creating a bootable USB thumb drive installer.