If you are planning to install macOS Catalina, there is one additional set of steps you should follow. You should download a bootable copy of macOS Mojave. This is the only way to downgrade if you decide you're not ready for macOS Catalina.
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Before you start
Before you get started, make sure you have a thumb drive with at least 15GB of storage, or a spare external hard drive (one that you don't use with anything else).
You'll also need to download macOS Mojave from the Mac App Store.
Kensington trackball mac os driver windows 7. Note: After macOS Mojave has downloaded, it will automatically begin the installation process. Close the installer instead.
Jan 10, 2020 You can easily burn a bootable image of OS X on a DVD by using Disk Utility. Boot from External USB: Using your USB drive to boot Mac is not as simple as you think. You need to prepare your USB drive beforehand for this specific purpose. You have to format the USB drive and insert the proper Operating System, which is OS X. Turn on your Mac. Jul 31, 2018 The machine will start to boot from the USB drive. Way 2: Set a Mac Boot from USB Drive using Startup Disk. When you use Startup Disk preferences to set Mac boot from an external drive, so it’ll boot from that disk until you choose a different one. Here is how: Step 1: Go to Apple menu System Preference, then click Startup Disk. Mar 10, 2017 Select the USB bootable installer you created and run through the installer selecting the Ext hard drive for that OSX as seen in the early part of this video i.e Yosemite 1010. Once the OSX is. Step 1 Connect your external drive to your unbootable Mac. Step 2 Press down on the ‘Option’ key after restarting your Mac. Step 3 Once the booting has finished, your Mac will display the Startup Manager to show you the available boot drives. Select your external hard drive and hit ‘Return’. Fire up Disk Utility from Spotlight (Command+Space) or the Utilities folder in your applications. You’ll be greeted with a list of all of your volumes, including your internal hard drive (probably called OS X or Macintosh HD) and your external hard drive. Here’s where we get to that hidden feature we mentioned.
Please, Please, Please, backup your Mac before you do anything.
How to format your external drive for Mac
You'll need to start with a clean thumb drive or hard drive in order to get it ready to work as a bootable drive.
- Plug the USB end of the drive to a USB port on your Mac.
- Click on Finder in your Dock to open a Finder window.
- Select Applications from the list on the left side of the window.
- Scroll down and double-click on Utilities.
- Scroll down and double-click on Disk Utility.
- Select your drive under External.
- Click on the Erase tab at the top of the window.
- Note the name of your external hard drive (probably 'Untitled') because you will need it when you create a bootable drive. If you have more than one external hard drive named 'Untitled,' you will need to rename your hard drive now.
- If your Mac is using HFS+, select Mac OS Extended (Journaled) from the format list. If your Mac is using APFS, select APFS from the format list.
- If Scheme is available, select GUID Partition Map.
- Click Erase.
- Click Done when the process is complete.
- Close the Disk Utility window.
Your thumb drive or external hard drive is now ready.
How to make your external drive bootable for installing macOS Mojave
Important:You will need to be in your Mac's administrator account in order to run the sudo Terminal command.
- Click on Finder in your Dock to open a Finder window.
- Select Applications from the list on the left side of the window.
- Scroll down and double-click on Utilities.
- Scroll down and double click on Terminal.
- Recall the name of your formatted external drivewhen entering the following text into Terminal. If it is not named 'Untitled,' you will need to change the command syntax for the pathname where it says: Volumes/Untitled. The name of the drive can't have any spaces and it is case sensitive.
- Enter the following text into Terminal (Don't forget to change the name 'Untitled' if your hard drive is named something else):sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
- Hit the enter/return key.
- Enter your administrator account password. This is the password you use to make changes on your Mac or log in. No text will appear in Terminal when you enter the password.
- Type Y to confirm that you want to erase the drive and press return.
The process could take a very long time, depending on the drive. When it is done, the Terminal window will report 'Done.' Restore mac os from external hard drive.
How to use macOS Mojave as an installer boot drive
Once macOS Mojave is installed on your external drive, you can boot up and install any Mac with the drive plugged into it.
- Turn off the Mac you want to install macOS Mojave with the bootable drive.
- Connect the external drive to your Mac via the USB port.
- Turn on your Mac.
- Hold down the Option key when you hear the startup chime.
- Select the external drive with macOS Mojave on it from the list of systems to start up your computer.
The installation process will begin. Follow the steps to install macOS Mojave onto your Mac or partitioned hard drive. Hp laserjet cp1215 toolbox download.
Do you have any questions about how to create a bootable installer drive for macOS Mojave? Let us know in the comments.
Updated September 2019: Updated for macOS Catalina.
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