The easiest way to create a USB flash installer is with the free program, Disk Creator. Download the macOS Sierra installer and Disk Creator. Insert an 8GB (or larger) flash drive. If you have any. UniBeast is a tool by MacMan and tonymacx86 to create a bootable USB drive from any Mac App Store purchased copy of OS X. This is an all-in-one bootable USB drive can also be used as a rescue boot drive for system recovery. However, without this tool, there is TransMac that you can use them on your Windows operating system.
It doesn't matter whether you use macOS or Windows 10, it's just a matter of time until your device will refuse to start, which could happen for many reasons, including (and not limited to) file corruption, hardware failure, and buggy update. If the unexpected happens with an Apple computer, you can use a macOS bootable USB with the installation media to repair it.
UniBeast is a tool by MacMan and tonymacx86 to create a bootable USB drive from any Mac App Store purchased copy of OS X. Download windows media player 12 for mac. This is an all-in-one bootable USB drive can also be used as a rescue boot drive for system recovery. However, without this tool, there is TransMac that you can use them on your Windows operating system. If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt (⌥) key is pressed. This will launch Apple's ‘Startup Manager' which shows bootable devices connected to the machine. 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.
This is one of the main reasons why you should always consider making a macOS bootable USB when your device is working properly. However, if it happens that none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro or Mac Mini) aren't working when you need them the most, then you can use a PC to rescue your Apple device. You can use a Windows 10, Windows 8.1, or Windows 7 device to quickly create a USB bootable installation media to reinstall macOS Catalina or Big Sur on your Mac.
In this guide, you'll learn the steps to create a macOS Catalina bootable USB installation on Windows 10, which you can use to reinstall or upgrade the Apple OS.
Requirements
Before proceeding, you'll need the following:
- Broken Mac computer running macOS (version 10.12, 11, or later).
- Trial copy of the TransMac software.
- One high quality USB flash drive with 16GB of storage.
- Copy of macOS (DMG file).
Create macOS bootable USB installation media
Mac Os X Create A Bootable Usb
To create a bootable USB drive with macOS, use these steps:
Download and install TransMac on the Windows 10 device.
Quick note: This is a paid software, but it gives you a 15-day trial, which is more than enough time. (If this works for you and want to support the developer, you can purchase the full version.)Connect the USB flash drive. (If you have any data on the flash drive, remember to make a backup, as everything on it will be erased.)
Right-click the TransMac app, and select the Run as administrator option.
Click the Run button. (If you're using the trial version, wait 15 seconds.)
Right-click the USB flash drive, select the Format Disk for Mac option, from the left navigation pane.
Quick note: You want to do this before creating the bootable media because there is a good chance that the drive was formatted using a Windows device. If this is the case, chances are that it's using a MBR partition, and the USB drive needs a GPT partition to work on a Mac.Click the Yes button to format the drive on the warning message.
Confirm a name for the drive. For example, 'macOS bootable USB'.
Click the OK button.
Click the Yes button.
Click the OK button.
Right-click the USB flash drive and select the Restore with Disk Image option from the left navigation pane.
Click the Yes Word and excel for macbook. button to confirm the erase of the USB flash drive data.
Click the browse button on the right.
Select the .dmg file with the macOS installation files.
Click the Open button.
Click the OK button.
Click the Yes button.
Once you complete the steps, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest version of macOS, which can be Sierra, Catalina, Big Sur, or higher.
Create a GPT partition on USB flash drive
If the USB flash drive is not working with TransMac, it could be still a partition problem. In this case, you may need to redo the entire process again. However, this time use the following steps to use the Diskpart command-line utility on Windows 10 to create the appropriate GPT partition, and then follow the above instructions.
- Broken Mac computer running macOS (version 10.12, 11, or later).
- Trial copy of the TransMac software.
- One high quality USB flash drive with 16GB of storage.
- Copy of macOS (DMG file).
Create macOS bootable USB installation media
Mac Os X Create A Bootable Usb
To create a bootable USB drive with macOS, use these steps:
Download and install TransMac on the Windows 10 device.
Quick note: This is a paid software, but it gives you a 15-day trial, which is more than enough time. (If this works for you and want to support the developer, you can purchase the full version.)Connect the USB flash drive. (If you have any data on the flash drive, remember to make a backup, as everything on it will be erased.)
Right-click the TransMac app, and select the Run as administrator option.
Click the Run button. (If you're using the trial version, wait 15 seconds.)
Right-click the USB flash drive, select the Format Disk for Mac option, from the left navigation pane.
Quick note: You want to do this before creating the bootable media because there is a good chance that the drive was formatted using a Windows device. If this is the case, chances are that it's using a MBR partition, and the USB drive needs a GPT partition to work on a Mac.Click the Yes button to format the drive on the warning message.
Confirm a name for the drive. For example, 'macOS bootable USB'.
Click the OK button.
Click the Yes button.
Click the OK button.
Right-click the USB flash drive and select the Restore with Disk Image option from the left navigation pane.
Click the Yes Word and excel for macbook. button to confirm the erase of the USB flash drive data.
Click the browse button on the right.
Select the .dmg file with the macOS installation files.
Click the Open button.
Click the OK button.
Click the Yes button.
Once you complete the steps, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest version of macOS, which can be Sierra, Catalina, Big Sur, or higher.
Create a GPT partition on USB flash drive
If the USB flash drive is not working with TransMac, it could be still a partition problem. In this case, you may need to redo the entire process again. However, this time use the following steps to use the Diskpart command-line utility on Windows 10 to create the appropriate GPT partition, and then follow the above instructions.
Create Bootable Os X Usb On Windows
To create a GPT partition on a removable drive, use these steps:
Open Start.
Ifunia video converter pro 5 5. Search for Command Prompt, right-click the top result, and select the Run as an administrator option.
Type the
diskpartcommand and press Enter.Enter the
list diskcommand to view all drives connected to your computer and press Enter.Type the
select diskcommand followed the number assigned for the USB flash drive (for example,select disk 4), and press Enter.Enter the
cleancommand and press Enter.Type the
convert GPTcommand and press Enter.Enter the
create partition primarycommand and press Enter to complete the process.
Once you formatted the USB flash drive with a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip the steps No. 5 through 10, and continue on step 11.
After the process completes, which can take up to an hour, connect the USB flash drive and power on your Mac holding down the Option key, select the USB drive to begin the installation of macOS.
If you're having problems creating the bootable media, you can get a USB flash drive that comes with macOS Sierra, El Capitan, Catalina, etc., on it with the link mentioned below. (I haven't tried it personally, but it's worth the try if nothing works.)
