A macOS Catalina USB install drive is a great tool to have on hand to for quick and easy macOS 10.15 reinstalls. We show you how in this video tutorial.

  1. You may receive the following warning: The created USB device will not boot off a Mac. Insert it into a PC, and select the USB boot option in the BIOS boot menu. You can ignore this warning as long as you used the Distribution option and not the ISO option when creating the bootable USB drive.
  2. I can confirm that I was able to use a Late 2014 Mac Mini running Catalina 10.15.4 with a USB-A to USB-C cable. Used the Revive option and the Macbook (after a long time) came back with no data loss at Catalina 10.15.5.
CatalinaBoot

Boot Camp Assistant User Guide

You can use Boot Camp Assistant to install Windows 10 on your Intel-based Mac.

Newer Mac computers use a streamlined method to install Windows on your Mac. To find out whether your Mac uses this method, see the “Learn more” section in the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant. If your Mac is an older model that requires an external USB drive, follow the instructions in Install Windows on your older Mac using Boot Camp instead.

What you need

  • The keyboard and mouse or trackpad that came with your Mac. If they aren’t available, use a USB keyboard and mouse.

  • A full-installation, 64-bit version of Windows 10 on a disk image (ISO file) or other installation media.

    You can download a Windows 10 Disc Image (ISO File) from Microsoft.

  • Sufficient free storage space on your startup drive. For information about the amount of free space needed, see the Apple Support Article Install Windows 10 on your Mac with Boot Camp Assistant.

Before you begin

Before you install Windows, make sure you back up important files.

You can use Time Machine or any other method to back up your files. For information about backing up files, see Back up your files with Time Machine and Ways to back up or protect your files.

Perform the installation

On your Mac, do the following steps in order.

Step 1: Check for software updates

Make Boot Usb Mac Catalina

Before you install Windows, install all macOS updates.

  1. On your Mac, log in as an administrator, quit all open apps, then log out any other users.

  2. Choose Apple menu > System Preferences, click Software Update, then install all available macOS updates.

    If your Mac restarts after installing an update, open Software Update again to install any additional updates.

Step 2: Prepare your Mac for Windows

Boot Camp Assistant prepares your Mac by creating a new partition for Windows named BOOTCAMP and downloading the Boot Camp support software.

Important: If you’re using a Mac notebook computer, connect it to a power source before continuing.

  1. On your Mac, open Boot Camp Assistant , located in /Applications/Utilities.

  2. At the Introduction screen, click Continue.

    The system is checked for total available disk space. Older Time Machine snapshots and cached iCloud files are removed to make space for Boot Camp. This process may take a long time to complete (you can click the Stop button to skip this process).

  3. If you have only one internal disk, choose the Windows ISO image, specify the partition size by dragging the divider between the macOS and Windows partitions, then click Install.

  4. If you have multiple internal disks, follow the onscreen instructions to select and format the disk you want to install Windows on and to choose the Windows ISO image.

    • If you select your startup disk: You can create an additional partition for Windows. Specify the partition size by dragging the divider between the macOS and Windows partitions.

    • If you select an APFS-formatted disk: You can either create an additional partition on the disk for Windows, or erase the entire disk and create a partition for Windows. If you choose to create an additional partition, specify the partition size by dragging the divider between the macOS and Windows partitions.

    • If you select a non-APFS-formatted disk: You can erase the entire disk and create a partition for Windows.

    If Boot Camp is already present on the disk you select, you also have the option to uninstall it.

    Important: You can’t resize the partition later.

When this step is complete, the Windows installer starts.

Step 3: Install Windows

  1. In the Windows installer, follow the onscreen instructions.

    When the installation is finished, your Mac automatically restarts using Windows.

  2. Follow the onscreen instructions to set up Windows.

Step 4: Install Boot Camp on Windows

After installing Windows, Boot Camp drivers that support your Mac hardware start installing.

Note: If the support software doesn’t install automatically, you need to install it manually. For instructions, see the Apple Support article If the Boot Camp installer doesn't open after using Boot Camp Assistant.

  1. In the Boot Camp installer in Windows, follow the onscreen instructions.

    Important: Do not click the Cancel button in any of the installer dialogs.

    If a message appears that says the software you’re installing has not passed Windows Logo testing, click Continue Anyway.

    You don’t need to respond to installer dialogs that appear only briefly during installation, but if a dialog asks you to install device software, click Install.

    If nothing appears to be happening, there may be a hidden window that you must respond to. Look behind open windows.

  2. When the installation is complete, click Finish.

  3. After your Mac restarts, follow the instructions for any other installers that appear.

See alsoGet started with Boot Camp on MacTroubleshoot Boot Camp Assistant problems on MacApple Support article: How to use Pro Display XDR with Boot CampApple Support website: Boot Camp Support

Boot Camp Assistant User Guide

You can use Boot Camp Assistant to install Windows 10 on your Intel-based Mac.

Install Windows on your Mac

Depending on the model of your Mac, you might need an external USB drive to install Windows (you’re asked for one when you prepare your Mac for Windows if it’s required). Newer Mac models—with OS X 10.11 or later—use the internal drive to temporarily store the items you need to install Windows and don’t require a USB drive. To find out whether you need an external USB drive, see the “Learn more” section in the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant.

To install Windows on your Mac, do one of the following: Download catalina to make usb.

  • If your Mac doesn’t require an external USB drive: Follow the instructions in Install Windows on your newer Mac using Boot Camp.

  • If your Mac requires an external USB drive: Follow the instructions in Install Windows on your older Mac using Boot Camp.

Set the default operating system

After installing Windows, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.

  1. In macOS, choose Apple menu > System Preferences, then click Startup Disk.

  2. Click the lock , type an administrator name and password, then click Unlock.

  3. Select the startup disk that has the default operating system you want to use.

  4. If you want to start up using the default operating system now, click Restart.

The next time you turn on or restart your Mac, it starts up using the default operating system.

Mac Won't Boot From Usb Catalina

See alsoConfigure your Mac in Windows using Boot CampRemove Windows from your Mac using Boot CampTroubleshoot Boot Camp Assistant problems on MacApple Support website: Boot Camp Support
Coments are closed
Scroll to top