Luckily it can still be done, and we explain This is because when High Sierra launched Apple stopped making older versions of the OS available to download via the Mac App Store. ![]() With macOS Catalina, Mojave or High Sierra installed it’s a little tricky to get the installation files for older versions of macOS. When the installation starts the files will be disposed of, so you need to step in before hand! You will also be able to download the installer via Software Update if you haven’t yet installed it.ĭownload the installation files, but make sure you stop before the actual installation starts. When it is available you will be able to find it on the Mac App Store. MacOS Ventura will be available to download from 24 October 2022. How to download old Mac OS X and macOS versions. Below we’ll look at how to get Monterey installers as well as how to get older versions of the macOS or even Mac OS X. How to get macOS installer filesĪs we said already, how you get the installation files will depend on the version of macOS you are running currently and the version you want the installer for. ![]() requirements.It goes without saying that you will need an internet connection to download the software and you may need it while installing the version of macOS if it needs to check for firmware or confirm your iCloud credentials. SP742 - macOS Sierra 10.12 - Technical Spec. SP765 - macOS High Sierra 10.13- Technical Spec. SP777 - macOS Mojave 10.14 - Technical Spec. SP803 - macOS Catalina 10.15 - Technical Spec. HT212551 - macOS Monterey 12 - compatibility. HT201372 - Create a bootable installer for macOS. Sw_vers - Print macOS operating system version. The target system will require 26 GB to 44 GB of free space for an installer to run. The macOS Startup Manager will then appear and you can select a startup drive. To boot from an alternate drive restart your Mac while holding down the Option key. The build process can take 20 minutes or so to complete, wait for the 'Done' message If you see the message “ To continue we need to erase the disk at /Volumes/Untitled.” Type the letter Y and press Return. Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Sierra.app -nointeraction Sudo /Applications/Install\ macOS\ High\ High Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ High\ Sierra.app -nointeraction Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Mojave.app -nointeraction Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Catalina.app -nointeraction Sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Becasue we are using sudo you will be prompted for a password: Open the terminal and copy one of the following, single line commands. The program used to create a bootable drive ( createinstallmedia) is supplied as part of the installer App. You could name the drive to something different as long as you adjust the command line syntax below to match. The Terminal commands below assume that the drive is named Untitled. Name the drive ' Untitled' this name will be changed when the new volume is initialised. The drive must be formatted as a Mac OS Extended (Journaled) volume with a GUID Partition Table. ![]() This can be a hard drive, an SSD, or a USB stick. You need a Mac-formatted drive big enough to hold the installer and its data - 12 GiB. Then copy the installer App somewhere else so that you won't have to download it again.Īt the command line, spaces must be escaped so these become: Therefore your first step after downloading the installer should be to cancel the install. If you run the macOS installer from the /Applications folder, the installer app will be deleted. MacOS is distributed through the App Store which will download an installer app to the /Applications folder. Use a USB flash drive (or other removable media) as a startup disk from which to install macOS.
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