You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or you're unable to install a compatible macOS from the Finder or macOS Recovery.
For information about the createinstallmedia command and the arguments you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:
Use Usb As Mac Os X Installer For Mac
But creating a bootable USB disk allows you to install or update macOS on multiple systems without having to download the installer on each Mac. This can save quite a bit of time, considering the most recent versions of macOS have an installer size of 12GB.
You can also use the built-in recovery tools that come with the macOS installer to troubleshoot and fix different kinds of issues. These issues include when your Mac refuses to boot or when you need to recover system files that seem to be lost.
Apple has changed the method for downloading versions of the operating system of macOS. While the installers were previously available to download via the App Store, newer versions (macOS Mojave and later) update the system from System Preferences.
To download the latest version of the macOS installer for installing on a USB, open up the System Preferences and navigate to Software Update. You should see the option to download the installer here.
In the event that you are already running the latest version of macOS, you might not see the option to download the installer in System Preferences. In that case, use the App Store method detailed above. This will force System Preferences to download the installer, which you can then use to create the bootable disk.
You should now see an option to select your USB drive as a startup disk. After selecting it, your system will boot off your USB drive and enter macOS Recovery with the macOS Monterey installer appearing on your screen. If you want to erase your disk first, to do a clean install, quit the installer and run Disk Utility from the Recovery menu. You can format the drive and then go back to the Recovery menu and install macOS Monterey.
In some cases, Intel Macs with a T2 chip (Intel Macs released after 2018) may not allow you to boot a macOS installer from an external drive. This is due to a setting in the Security Startup Utility that needs to be adjusted. This can be done by following the steps explained below:
Below, we'll walk you through everything you need to know to help you to install macOS from a USB. It's worth noting that you can currently only create a bootable installer for macOS 12 Monterey, macOS 11 Big Sur, and a few earlier versions, such as Catalina, Mojave, High Sierra and El Capitan. Ready to get started? Let's dive in...
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 should download from Apple, not a locally hosted software-update server.
Once you have your bootable installer ready, it's time to move to the next step. Connect the USB flash drive to the computer you wish to install macOS. Choose 'Finder' then select 'Go' from the menu bar. Click 'Utilities', then 'Terminal'.
In the next step, you'll enter a command in Terminal. The command differs, depending on the macOS version you're going to install. With each command, it's assumed the installer is located in your 'Applications' folder and 'MyVolume' is the name of the USB flash drive. Change the name in the command to match your settings, if necessary.
You've made it to the final step of learning how to install macOS from a USB. It's now time to use the bootable installer to install a fresh copy of macOS. The steps are different, depending on whether you're using an Intel-based Mac or one with Apple silicon.
You can create a bootable installer for any operating system if you have the right installer. In older versions of macOS, you could find all the previous installers in the list of purchased apps in your App Store account.
If you open App Store and click Updates, you can update your Lion installer to version 1.0.16. It replaces your copy if you allowed it to self-erase at installation. But using the InstallESD.dmg from inside this installer (SHA1 = 8ef208772f878698e9dd92b3632e25b23ffc9ca7) creates a bootable 10.7.3 (11D50) USB stick. That is cool.
This does not work for the version released through the app store as 10.7.0, there is no such install file left around. Maybe Apple adjusted the installer to prevent this? I am looking for a way to do this to install to my other machines as this iMac will be going back to Snow Leopard for the time being.
you will be able to do an upgrade using this methodon your macs as long as they have core 2 duo ornewer intel processor 2gb of ram or more 8 + gb of harddrive space free I would recommend 40gb + free forbest performance and even though you have downloadedlion using a Mac other than you are installing it on the installerwill still insist you have to be running 10.6.6 or laterand will not proceed with the upgrade unless you are running10.6.6 or later
If you have the foresight to let Time Machine perform a full backup of your Mac before running the Lion installer (but after it has downloaded from the App Store) then you can skip re-downloading the 4Gb file. Just go to Time Machine, visit your Applications folder, find the TM backup with the Lion installer (Install Mac OS X Lion) and restore it. Ta-da! ;)
To start we'll want to grab ourselves a copy of macOS. You can skip this and head to formatting the USB if you're just making a bootable OpenCore stick and not an installer. For everyone else, you can either download macOS from the App Store or with Munki's script.
From a macOS machine that meets the requirements of the OS version you want to install, go directly to the App Store and download the desired OS release and continue to Setting up the installer.
From here, jump to Setting up the installer to finish your work. 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.
Now we'll be formatting the USB to prep for both the macOS installer and OpenCore. We'll want to use macOS Extended (HFS+) with a GUID partition map. 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.
Both disk image distributions (.dmg and .cdr) also contain the newinstaller package.It will install rEFIt on your Mac OS X installation volume andmake sure it is active.This is now the recommended way to install and use rEFIt.
Some issues: If you upgrade to Catalina on a computer with a working JMRI installation, it should continue to work. (If not, please let us know on the jmriusers group.) If you installed Oracle's Java 8 before upgrading to Catalina, it'll still work. If you want to install Java 8 from Oracle onto a Catalina system, there are some instructions on the Oracle website. The Oracle Java 11 installer is an easier installation, and works fine with JMRI, so we recommend you do that instead. JMRI versions before 4.17.5 are very hard to properly install on Catalina, and we don't recommend trying. We hope to have JMRI 4.17.5 fully compatible with Catalina for new installs. To install JMRI 4.17.5 or later on Catalina, please drag the JMRI folder to the Applications folder. Depending on your system security settings, dragging it to Downloads, Documents or Desktop might not work.Customizing your JMRI InstallationYou might want to have more than one Configuration for DecoderProor PanelPro preset. For example, you might to sometimes connectPanelPro to the Command Station on your layout, or other timeshave a configuration that doesn't use a layout connection so you canwork with the program on a laptop away from the layout.With macOS, JMRI makes this easy to do. PanelPro and DecoderPro savetheir Preferences separately, so they can be configured independently.On a Mac, the different Preferences files take their name from the name of the application icon that's invoked.This lets you create multiple copies of e.g. DecoderPro that each use their own, separate Preferences files.Let's say you want one called "CoolNewOne".Duplicate the DecoderPro application icon (ctrl-click to get a popup menu and say duplicate,or select the icon and choose duplicate from the File menu in Finder).Change the duplicate's name.(It's probably better to use a simple one-word name like "CoolNewOne")Double click your new icon, and off you go.It won't work to drag one of the JMRI application icons out of theJMRI folder, since they need the other files that can be found there.If you want an icon in some other place, like on your desktop:Go to the JMRI folder and select the application icon.From the file menu, select "Make Alias"Drag that new alias icon to its new location, and optionally rename it.Note that renaming the alias alone does not cause the application icon to be renamed, so the alias will be using thesame Preferences as the original. Thanks and congratulations to all who contributed! Contact us via the JMRI users Groups.io group.
OS X 10.9 Mavericks Installation on Gigabyte Motherboards - Explains how to install OS X Mavericks, as well as Lion and Mountain Lion, on Gigabyte motherboards using the Hackinstaller script. This tutorial also includes a list of FAQs that can be quite helpful for troubleshooting.
If you should encounter any issues updating in this fashion, then consider simply uninstalling the old version of Globus Connect Personal, downloading the new version, and then installing the new version from the downloaded installer. 2ff7e9595c
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