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HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY HOW TO
HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY MAC OS
HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY INSTALL
HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY UPDATE

Step 5: Again click Erase and wait till Disk Utility creates the partition and prepares your USB drive. Select Erase Option"> Note: Your drive might be shown as Untitled by default, rename it if you want.

HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY MAC OS

In the Erase prompt window, select Mac OS Extended (Journaled) as the format and GUID as the scheme. Step 3: Select the USB drive or external drive in the Sidebar (Select the root drive and not the volume). Note: If you are using High Sierra or later macOS versions other than Big Sur, click the View button on the top left corner and select the Show All Devices option from the dropdown menu. Alternatively, press Command + Spacebar to open Spotlight search and type Disk Utility to find and open it. Step 2: Launch Finder from Dock and open Disk Utility from the Applications section. Step 1: Connect the USB thumb drive or any external volume to your Mac system. So, make sure you have nothing stored on the USB. It is to be noted that the createinstallmedia command erases everything on your external USB drive.Insert the relevant command in the Terminal with utmost caution.Post Maverick, creating a bootable USB installer for macOS requires a single command (which we have given below for each macOS separately).Note: The process described below applies to the macOS Maverick and later versions only.īefore you move ahead, here are a few facts that you must know: Follow the steps below to create a bootable USB of any of the macOS mentioned above. You can use the ' createinstallmedia' command to create bootable USB for Mac.

HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY UPDATE

System Preference > Software Update > Download macOS Big Sur. Note: If you have macOS Catalina, then follow the steps below to download Big Sur installer:

HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY INSTALL

The above procedure will download the installer file in your Applications folder as an app named Install macOS Big Sur/ Catalina/ Mojave/ High Sierra. If the installer opens after download, close the prompt without continuing the installation.

The installer file will start to download.

In the App Store, you will find the macOS Installer, click on Get button on the top right corner.

You can use the App Store to download the installer file. A prompt appears asking you to use the App Store instead of the website.

It will redirect you to the Apple website.

Click on the macOS for which you want to download the installer file.

Follow the below steps to get the macOS installer file of Big Sur, Catalina, Mojave, and High Sierra: To create bootable USB, you need to first download the macOS installer file.

A downloaded installer file of the macOS version, for which you have to create the bootable USB installer for Mac.

A USB thumb drive or any other external drive formatted as macOS Extended, with storage capacity of at least 14 GB.

What’s Needed to Create Bootable USB for Mac?īefore you start, you need to keep the following things handy:

HOW TO MAKE A BOOTABLE USB MAC DISK UTILITY HOW TO

If you want to know how to create a bootable USB to install macOS Big Sur, Catalina, Mojave, and High Sierra, then this post is for you. You can use this bootable USB macOS installer to perform a clean install of macOS, install macOS from USB on a separate volume of your Mac drive, or in case your Mac encounters OS issues. So if anyone cares to shed a little light on what is happening I would appreciate it.If you plan to install macOS on multiple Mac systems and don’t want to download the installer multiple times, then you can create a bootable installer. I am guessing that the format of the img file is causing the partition to be a FAT16 partition but I am waiting to hear back from PassMark regarding that. Both boot into the MemTest86 utility which is my goal but I first didn't expect the partition layout that I got and I can't figure out why I get 2 boot icons to select from. When I boot the system into the Startup Manager there are 2 extra drives to boot from, both named "efi boot", all lower case. Now, although, this isn't what I expected it does sort of work. It is now named Untitled and it is a FAT16 partition. The data is written to the first partition which used to be the EFI partition. Now, the file does end up on the usb drive but. Sudo dd if='//Volumes/Mac Mini Backup/Archives/MemTest86 Pro/memtest86-pro-usb/memtest86-pro-usb.img' of=/dev/disk3 bs=1m To copy the img to the disk i first unmount the partitions on disk3 This gives me what I would expect, the first partition is an EFI partition of size 209.7MB and the remaining 3.6GB, on a 4GB drive, being allocated to the second partition, /dev/disk3s2, MemTest86. I first partitioned the drive using:ĭiskutil partitionDisk /dev/disk4 1 GPT "HFS+" "MemTest86" 100% I am creating a bootable usb for MemTest86. I have had some success but not exactly what I wanted or expected. I am trying to create a bootable usb drive using diskutil and dd.