Mac Os Usb Bootable Drive


After successfully created a macOS bootable USB, the next step is how to use it to install macOS from external USB drive. This is not normal case because macOS is very stable and have less bugs/virus than Windows PC. So many Mac users don't know how to perform a clean install of macOS on their Mac when the device was broken or could not boot into desktop.

Please don't worry. We will share detailed steps on how to install macOS/Mac OS X from an USB drive. Even you had issues during this process, it is not thing to be afriad as we have offered the troubleshooting guide as well.

How to Install macOS on Mac from USB Drive (Normal Way)

If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way.

  • To create your own Mac OS X recovery USB drive, all you need is a 1GB or larger USB drive. If you have a USB drive larger than 1 GB, you can create a 1.5 GB or 2 GB partition for the recovery drive because the creation process will erase the whole USB drive and use all of the available space no matter how large it is and the drive will become.
  • Sep 23, 2019  One high quality USB flash drive with 16GB of storage. A copy of Apple’s macOS (DMG file). Now that you have all the necessary ingredients, you’re ready to make a Mac OS X bootable USB using the DMG file of the operating system with the steps below. How to create Mac OS X bootable USB installation media.

Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer.

Step 2: Shut down the Mac and wait for 1-2 minutes. This will make sure the Mac is powered off.

Step 3: Hold the Power and Option key simultaneously for 15 seconds. This will bring up the Startup Manager on Mac.

Mar 12, 2020  Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended. Open Terminal, which is in the Utilities folder of your Applications folder.

Step 4: You will see all bootable devices attached to this Mac, including Macintosh HD and external USB or DVD. Click the drive name of your macOS bootable USB to start the installation process.

Step 5: Agree the terms and conditions and wait for the installation process to be done.

How to Install macOS on Mac from USB Drive (Advanced)

If the drive was not partitioned or the partition table was corrupted, then you can not install macOS on Mac with the normal way. You have to boot Mac into Recovery mode and format the hard drive or SSD to Apple file system first.

Step 1: Shut down your Mac and press the Power key to turn on the Mac; then immediately press Command and R keys.

Step 2: You will be directed to the macOS utility section and here you need to select 'Disk Utility' to format the USB drive. From the Disk Utility app, select Mac drive name under Internal section and then click on the 'Erase' button.

Step 3: You will get a couple of options from the Format. Pleasec choose APFS (macOS) or Mac OS Extended (Journaled) for old version Mac OS X.

Step 4: After the completion of the formatting process, go back to the macOS utility section and this time, select 'Reinstall macOS'.

Step 5: Further, go to the Startup Manager, move to the External drive section, and select your bootable macOS USB drive.

Step 6: Now, the configuration of MacOS will start. As soon as the process starts, it will provide Terms and Agreement page and your job is to agree with the same and then click on the continue button.


Step 7: After that, click on the 'Continue' button to start the installation process. This will take 30-45 minutes and once it gets completed, restart Mac.

Step 8: As you are using the fresh copy of MacOS on Mac machine, so you need to set up the OS and for that connect the Mac with the Wi-Fi and then sign in with the Apple account.

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Step 9: After signing in, you can access the several products of Apple such as iCloud, DropBox and many more.

Quick Troubleshooting Tips if You Got Stuck during MacOS Installation

Could not write installation information to disk

If you see the message like 'Could Not Write Installation Information to Disk' when you are trying to install the OS, it means, some important files are missing from the bootable USB device. Mostly, this error happens when you download Mac OS file from an unauthorized site.

You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same.

Compatibility error

If you are upgrading the OS X after having an older version, you can get the compatibility error message. In such case, just cross-check the system requirement for the OS you want to install on your Mac system.

You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same.

macOS could not be installed on your Computer

If you see the error message similar to 'macOS Could Not Be Installed on Your Computer' that means, either your system is not compatible or the Date and Time settings in your system is not up to date.

To resolve the problem, first, check the system combability for the OS X. If it's fine and still you are facing the error, then just update the system Time & Date with the option of 'Local Apple time server'.

Application is damaged, can't be used to install macOS

You the message 'application is damaged, can't be used to install macOS' appear on your screen, it means the OS certificated has been expired. And so, you won't be able to proceed further for installation.

The simple solution is; you need to create a fresh bootable USB by downloading the MacOS file from its official website.

MacOS couldn't install on this computer

Sometimes, the thirty-party tool which you use to create a bootable USB is the culprit. If the OS files will not be copied successfully using the bootable tool, then you may see the message like 'MacOS couldn't install on this computer'.

In this case, you should avoid using a third party bootable tool despite you should create a bootable USB with the help of command.

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The above tutorial covers most of the issues you could come across during the installation process. If you had other issues not mentioned in this article, please contact us and our technical team will help you fix it.

In this post, I’ll show how to Create macOS Catalina Bootable USB Installer via TransMac. With the macOS Catalina out, more and more users are heading towards it and installing it on different operating systems. Some of the examples are install macOS Catalina on VMware on Windows, install macOS Catalina on VirtualBox. There are two other different new methods. That is install macOS Catalina on VMware [New Method], install macOS Catalina on VirtualBox [New Method]. These are some of the most popular and also common examples of installing macOS Catalina on Windows. Apart from it, there are many installations and users could install on different places and different platforms. Here’s are three different ways we’ve provided to do.

Now for installing macOS whatever the version, we’ll need the installer files. While the macOS Catalina DMG file is easy to obtain from the App Store, it’s pretty easy to do it from a Mac but what happens when your Mac is not working or have some problem with its operating system. Instead, you’ve Windows in approach and would like to create macOS Catalina Bootable USB Installer completely on Windows. Or as the macOS Catalina is out, chances are you’ve lots of Mac and would like to create macOS Catalina bootable USB installer on Windows.

For installing most systems like Windows 10 and others, creating a bootable USB installer is the first step and also the most important step. Now creating a bootable USB isn’t as easy as it looks like and in some cases, I’ve lost many USBs in the procedure. The process requires some files specifically the operating system installer file and other differs for the process like if you’re creating a bootable USB for Mac, it’s a little easy, but if you’re creating a bootable USB installer for Hackintosh, it’s a bit trickier and requires some additional files but can be definitely done.

  • Related:How to Create macOS Catalina USB Installer – Hackintosh

Creating a bootable USB installer can be done in different ways. Just like we’ve previously shown a few ways to create macOS Catalina USB installer which would work probably for Mac and Hackintosh even. First, we created manually via Disk Utility and Terminal and also we provided the supporting files and the next method which we did was with Disk Utility, Terminal and also Clover. These were the two methods we did to create bootable USB installer for macOS Catalina.

For those who aren’t familiar with, Hackintosh is a simply process of installing macOS on a non Apple hardware which can be Windows. While we’ve already done some instructions for creating a bootable USB installer for Mac and Hackintosh, but for some reasons, it isn’t working for users, that’s why we’ve come up with a new post which is how to Create Bootable USB installer for macOS Catalina via TransMac. This process works for both creating bootable USB installer for macOS Catalina for Hackintosh and also for Mac.

With those in mind, whoever would like to install macOS Catalina or other version on Mac or install macOS Catalina or other version on Windows, we’ve prepared complete instructions to create a bootable USB installer for macOS Catalina. This procedure works for everyone but for those who are making it for Hackintosh remember that the USB and primarily Hackintosh or installing macOS only works with Intel-based CPUs. With that said, let’s jump into it.

What You’ll Need

For this process, we’ll need a couple of important files.

  • A 12GB+ USB

Create Bootable USB Installer For macOS Catalina via TransMac

There are several apps and ways to create bootable USB installer. For this example, we’ll use TransMac.

TransMac is a third-party Windows software that copies and manage files and folders on Apple systems, including Mac hard drives, USB flash drives, and other. As well as open and burn disc images and .dmg and .sparseimage files. It’s shareware which you can try for free for 15 days.

TransMac for Windows can open, erase Macintosh disk drives, USB flash drives, CD/DVD/Blu-ray media, DMG, DMG part, sparse bundle and sparse image files. Some of the features are create, compress and expand Mac dmg disk images, built-in CD/DVD burner to burn ISO and DMG files on Windows.

First and foremost, connect your USB and open TransMac. When the USB is shown, right click on it and select Format Disk For Mac.

Format Disk For Mac

Accept the warning by clicking on Yes.

Name the volume and click on OK.

Name The Volume For Mac

At the last warning of formatting the disk, click on Yes.

Last Warning of Formating Disk

After the disk is formatted, right click on the USB and select Restore with Disk Image.

Accept the warning by clicking on Yes once more.

Mac Os Create Bootable Usb Drive Windows 10

Warning Pop Up Message

Mac Os Usb Boot Disk Creator

Then click on the three dots to browse the macOS Catalina DMG and select it.

Choose the macOS Catalina DMG and click on OK.

Ok Restore Disk Image to Drive

Hit Yes on the pop and it will start creating the USB so it will take a considerable time.

Last Warning

After that, you’ll see the success message, and that’s now done.

In the end, download and copy and paste these files into the EFI Partition in the USB.

The USB drive is now completely ready for installing macOS on Windows or on Mac itself. So that’s how to create bootable USB Installer for macOS Catalina on Windows 10 with TransMac. This works perfectly now.

Create Bootable Usb On Mac

That’s it. If there’s some problem or suggestions, we’re happy to answer. Let us know in the comments down below.

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