You may need a bootable macOS Catalina USB drive to cleanly install the operating system or downgrade the macOS beta version. You can follow the steps here to create a bootable disk for any available version. However, since macOS Catalina is the current stable release, let me show you how to make a bootable installer drive.
- How To Create Bootable Usb With Mac
- Create Os X Catalina Install Usb
- Create Bootable Mac Os Usb
- Create Bootable Os X Usb On Windows
Create Bootable USB Installer for Mac OSX Using TransMac. To create bootable USB installer for Mac to Install Mac OS X El Capitan on Windows, on Mac or VirtualBox, you have to create bootable USB flash drive. Let's get started on how to do it. First, you have to download TransMac software for Windows and install it on your computer. The idea to create a Bootable USB for Mac with Virtual Machine is: First, we will Install MacOS High Sierra on Virtual Machine. When we Installed MacOS High Sierra, we will use Unibeast to Create Bootable USB for Mac. The Good thing about this method is, that is lengthy but it gives you 100% result. So this is the list of the Best Bootable USB software for Windows/Mac 2020 with which you can create a bootable USB drive. If this concept is new to you, Etcher seems to be a good option. On the other hand, if you deal only with Windows, you can go for Rufus or Windows USB/DVD tool.
Before You Begin:
- Make sure you have a USB flash drive with at least 16 GB capacity
- If there are files on it, copy it somewhere else as we will be completely erasing it
- Your Mac should be compatible with macOS Catalina
How to Create a Bootable macOS Catalina Installer Drive
- Download macOS Catalina from the Mac App Store. (You may download beta versions from Apple Public Beta page, or the developer page.)
- Once the download completes, the macOS Installer will launch automatically. Close it.
- Next, open Finder and click on Applications. Right-click on Install macOS Catalina. Select Show Package Contents.
- Open the Contents folder.
- Now, open the Resources folder. Keep this folder open.
- Open Terminal using Spotlight Search.
- In Terminal type the word sudo and then give a space.
- From the window in step 5, drag createinstallmedia to the Terminal.
- Next, type
--volumeand give space. - Connect the USB flash drive to your Mac
- Launch Finder and click on Go from the top menu bar. Next, click on Go to Folder. Here type /Volumes and hit enter (or click Go).
- Click on your Pen drive and drag it into the Terminal window.
- Hit the enter/return key. Enter your Mac's password when asked. (While typing password in Terminal, you won't see stars or typing confirmation. But keep typing it and hit the enter key when done.)
- Next, when prompted, type y and hit the enter/return key again.
Done!
The USB drive will be erased first, and then installer files will be copied to it. Erasing will be relatively quick. However, copying will take considerable time. Even if it is stuck at 0% or 10% for long, do not quit the Terminal window. The process is ongoing.
Signing off…
Note: If you have a Mac with T2 Security Chip (that is, Macs introduced in 2018 or later), first follow this guide to allow booting from external media.
After you create the bootable USB drive, the process to install it is simple. Make sure the USB drive is connected to the Mac. Next, click on the Apple logo from the top left and choose Restart. When you hear the startup sound or see the Apple logo, immediately press and hold the Option key. Select the bootable installer as the startup disk, and follow the instructions.
If you have issues, we have an extensive guide that addresses tips to fix when Mac Recovery Mode is not working.
The founder of iGeeksBlog, Dhvanesh, is an Apple aficionado, who cannot stand even a slight innuendo about Apple products. He dons the cap of editor-in-chief to make sure that articles match the quality standard before they are published.
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If you're using both Windows and macOS, you've to deal with when mac refuses to boot. The reason behind can be from a number of things that could go wrong. This includes system failure, bad updates, power failure, hardware failure. Unless there is a hardware problem that only can be diagnosed at the apple center you can fix your Apple computer.
It is an excellent practice always to have a bootable macOS USB, which you can easily create using macOS operating system. But since we're here, you probably can want to make bootable USB using Windows 10. Let's be real, and there are more Windows computers compared to MAC. Fortunately, you can use a Windows computer to create a bootable USB flash drive.
In this article, we'll help you with the instructions to create a bootable MacOS USB installation media from a Windows 10 computer. So that you can use that USB to install or reinstall (upgrade) Apple's MacOS. You can create a macos Catalina/sierra bootable USB using this guide to fix your operating system.
What's needed?
You will need a few things before you get started. The first essential thing in it is a USB drive would be awesome if you use a USB 3.0, but you can get the work done using slow USB as well. So, in contrast, you need these following things.
- One high-quality USB flash drive with 16GB of storage.
- TransMac software.
- MacOS operating system image (DMG file).
How to Create a macos Catalina bootable usb
How To Create Bootable Usb With Mac
The guide is simple and straightforward if you follow thiese step.
Download and install TransMac on your Windows PC. It's paid software with 15-day trial, so you can use it within the time to create a bootable MacOS USB flash drive. If you like the software and to support the developer you can buy the full version.
Plug the USB drive to your Windows computer that you'll be using to fix your MacOS. And we are going to tell you something straightforward – backup if things stored in USB Drive.
Step 1. Open the TransMac, and select Run as administrator. If you're using the trial version, wait 15 seconds, and click Run.
Step 2. Use your USB drive right-click on it and select format disk format this will format the USB drive so that it can be used to store the Mac OS operating system. One thing you need took care of that the USB drive needs in GPT partition in order to work on a Mac computer otherwise it won't boot.
When it prompts select a name for your USB it doesn't matter but just do it and click ok. If the formatting completed successfully, click OK to continue.
Step 3. Again from the left sidebar right-click on the USB drive and select restore with disk image.
Create Os X Catalina Install Usb
Step 4. Now browse to the location where the Mac OS system image file is located and click ok to load it.
Step 5. Click Yes to create the macOS USB bootable media.
It will take a few minutes to complete the process because the Mac Operating System is larger than any other operating systems like Windows and LINUX in size. Now plug the USB drive to Mac computer in order to install, install or upgrade the operating system to the latest version of Mac OS, which can be Sierra or later.
THE TOOL CAN
- Apple File System (APFS) volume read support.
- Open Mac APFS/HFS/HFS+ format disk drives, flash drives, CD/DVD/Blu-ray media, HD floppies, dmg, dmgpart, sparsebundle and sparseimage files.
- Copy files to Mac HFS+ disks and dmg images.
Format as HFS+ for Mac . - Save and restore images of disks and flash drives.
- Create, compress, expand and split dmg files.
- Built in burner functionality to burn ISO and dmg files directly to CD/DVD/Blu-Ray.
- Read Mac multisession and hybrid CDs.
- View partition layout.
How to create a GPT partition on a USB flash drive
If the USB flash drive is not working using TransMac, it could be still a partition problem. In this case, you want to redo the entire process again, but this time use the following steps to use the Diskpart command-line utility on Windows to create the appropriate GPT partition.
- Open Command Prompt as an administrator. Type cmd in run dialog or open it from the start menu.
- Type the diskpart command and press Enter. This will display that is connected to your computer.
- Enter the list disk command to view all drives connected to your computer and press Enter. This command will show all of the partitions inside of a disc.
- Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4), and press Enter. This command will select the disc partition of your choice.
- Enter the clean command and press Enter. This erases and formats the disc.
- Type the convert GPT command and press Enter. This convert master boot record to new GPT.
- Enter the create partition primary command and press Enter to complete the process.
Quickly create a macOS bootable USB on Windows
Now make bootable USB using the TransMac software (follow instructions that are given above). Now connect the USB and power on your Mac computer while holding the option key and then select the USB Flash media to run the installation.
Learn using USB on MAC (Apple support page)
Create Bootable Mac Os Usb
Learn more about making bootable USB.
Create Bootable Os X Usb On Windows
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