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.
What you need to create a bootable installer
Install Pkg Mac Terminal
This file contains a manifest of everything the package will install and where to; to read this file, use the lsbom command. Most packages (I'm using Office 2008 here) also have an Archive.pax.gz file, this contains everything that Installer will move into the various folders as instructed in the BOM file.
- You can create.pkg or.dmg 'installers' if necessary, however this is clearly not something apple aims to be standard. I would advise to use the.app pattern and any scripts needed should be self contained and executed on first run. You can use.dmg to distribute your application outside of App Store (this is still fairly normal).
- You can create.pkg or.dmg 'installers' if necessary, however this is clearly not something apple aims to be standard. I would advise to use the.app pattern and any scripts needed should be self contained and executed on first run. You can use.dmg to distribute your application outside of App Store (this is still fairly normal).
- A USB flash drive or other secondary volume, formatted as Mac OS Extended, with at least 12 GB of available storage
- A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra or El Capitan
Download macOS
- Download: macOS Big Sur, macOS Catalina, macOS Mojave or macOS High Sierra
These will be downloaded to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. 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. - Download: OS X El Capitan
This will be downloaded as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It will install 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.
Use the 'createinstallmedia' command in Terminal
- Connect the USB flash drive or other volume that you're using for the bootable installer.
- Open Terminal, which is in the Utilities folder of your Applications folder.
- Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace
MyVolume
in these commands with the name of your volume.
Big Sur:* http://kxysavn.xtgem.com/Blog/__xtblog_entry/19448180-1av-streamer#xt_blog.
Catalina:* Control alt on mac.
https://software-worth.medium.com/firetask-3-8-5-dpwnload-30eee679a25a. Mojave:*
High Sierra:*
El Capitan:
Mac Os Install Pkg
* If your Mac is using macOS Sierra or earlier, include the --applicationpath
argument and installer path, similar to the way this is done in the command for El Capitan. How to install word on mac without cd.
After typing the command: How to fill out a pdf file on mac.
- Press Return to enter the command.
- When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
- When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.
- When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.
Mac Install Pkg Command Line
Use the bootable installer
Create Pkg Installer Macos
After creating the bootable installer, follow these steps to use it:
- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
- Release the Option key when you see a dark screen showing your bootable volumes.
If you can't start up from the bootable installer, make sure the External Boot setting in Startup Security Utility is set to allow booting from external media. - Choose your language, if prompted.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
For more information about the createinstallmedia
command and the arguments that you can use with it, make sure the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:
- Big Sur: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
- Catalina: /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia
- Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia
- High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia
- El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia