download mac os high sierra usb installer

This will create two partitions: the main MyVolume and a second called EFI which is used as a boot partition where your firmware will check for boot files. We'll want to use macOS Extended (HFS+) with a GUID partition map. Now we'll be formatting the USB to prep for both the macOS installer and OpenCore.

Legacy macOS: Online method(10.7-10.15 Supported).

This method allows you to download much older versions of OS X, currently supporting all Intel versions of OS X(10.4 to current) If you want to check the integrity of your download, you can check this repository of checksums (opens new window), although do note that these are crowdsourced checksums and may not be a reliable way to check for authenticity.

Note 2: Running Cmd+Shift+G in Finder will allow you to easily jump to ~/macOS-installerįrom here, jump to Setting up the installer to finish your work.

Note: We recommend to move the Install macOS.app into the /Applications folder, as we'll be executing commands from there.

Mount it and you'll find the installer application. Once finished, you'll find in your ~/macOS-Installer/ folder a DMG containing the macOS Installer, called Install_macOS_11.1-20C69.dmg for example. This is going to take a while as we're downloading the entire 8GB+ macOS installer, so it's highly recommended to read the rest of the guide while you wait.

If you've already mapped your USB ports (opens new window) and disabled XhciPortLimit, you can boot macOS 11.3+ without issue.

For education purposes, we have a copy provided here: macOS 11.2.3 InstallAssistant(macOS) (opens new window).

macOS 10.15, Catalina) or find a 11.2.3 or older Big Sur installer We advise users either install an older OS(ie.

CAUTION: With macOS 11.3 and newer, XhciPortLimit is broken resulting in boot loops (opens new window).

For first time users, we recommend macOS Catalina (10.15) or Big Sur (11).

For more information, see here: macOS 12: Monterey

macOS 12, Monterey Note: As this OS is quite new, there's still some issues with certain systems to resolve.

If you need a particular versions of macOS, you can select it by typing the number next to it. Mkdir -p ~/macOS-installer & cd ~/macOS-installer & curl > installinstallmacos.py & sudo python installinstallmacos.pyĪs you can see, we get a nice list of macOS installers.

Getting started with ACPI (opens new window).

Now with all of this done, head to Setting up the EFI to finish up your work.

Download mac os high sierra usb installer