Mar 30, 2020 How to create a GPT partition on a USB flash drive; Things to know before proceeding. Before you dive into this guide, you’ll need a few things: A broken Mac computer with Mac OS X or macOS (version 10.12 or later). A trial copy of the TransMac software. One high quality USB flash drive with 16GB of storage. A copy of Apple’s macOS (DMG file).
These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS MojaveormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan
El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.
MyVolume
in these commands with the name of your volume.Y
to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created. * If your Mac is using macOS Sierra or earlier, include the --applicationpath
argument, similar to the way this argument is used in the command for El Capitan.
After creating the bootable installer, follow these steps to use it:
For more information about the createinstallmedia
command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
https://hetarioheb.tistory.com/6. CyberLine PowerDVD. Potplayer. KMPlayer. RealPlayer.
Mojave:
https://hetarioheb.tistory.com/4. The first two apps require or higher, but ClamXav still works on Snow Leopard, according to its developer. And it's sometimes a one-way trip.The I've written about before includes AdwareMedic, Intego Mac Internet Security X8, and ClamXav. But I recognize that not everyone is quite as anxious to uproot their Mac's operating system as I am. I'll be perfectly honest: I like the best of any of these apps.
High Sierra:
El Capitan:
Beginning in Lion (10.7), there's a new feature in Mac OS X to assist you if things go really wrong, since you can't boot from disk anymore. This new feature is called Recovery, and it gives you a way to start 'from scratch' if you need to rebuild your Mac.
There are a couple of methods for doing this, which both lead to the same place: A USB drive (8GB or larger), safely stashed in a drawer, which has a bootable OS on it, as well as an installer to put that OS on a hard drive.
First up is the 'official' method, a utility introduced with Mavericks, called Recovery Disk Assistant. This works with Lion, Mountain Lion, and Mavericks, all the versions of Mac OS that were distributed via the Mac App Store.
Using this method is pretty straightforward: download the Recovery Disk Assistant, plug in that USB drive, and follow the prompts. After a little while you will have a bootable backup of your OS.
An alternate method that dates back to the release of Lion is Disk Maker X, formerly known as Lion Disk Maker. This is a nice wrapper for a set of Applescripts that will also create a USB drive to back up from. This was the nicest option before Apple built a utility of its own. It works much the same way as Apple's too, launch the app and follow the prompts and you end up with a USB drive you can boot from.
Keep in mind you can't install an older OS than your computer shipped with, but otherwise to use this newly minted installer all you have to do is plug in the USB drive, and hold down the Option key while the machine boots. This will give you your boot drive options, then choose the USB stick and you're all set.