![]() So anything you could help me with to achieve this is greatly, greatly appreciated. It's a bit puzzling to me that the offical instructions for making a bootable USB drive for the older OS' just isn't correct or updated, even though the support page was updated December 4, 2020. I've used Terminal to make bootable OS install USB drives several times before and the guides online have worked with no problems. dmg image to my USB drive using Terminal, but my old mac does not recognize that the drive is connected at all when holding the option key when booting, to be able to boot from the USB drive and not the internal OS drive, so obviously -source - target restoring that. Headache Hi, I am fixing the MacBook Air (2016) of my sister in law, who was having issues. ![]() I've looked through countless pages from the biggest search engines and the furthest I've gotten is to duplicate the. Installing MacOS Sierra with bootable installer. pkg file and modifying the Terminal command doesn't work, but I'm no wizard for these kinds of things. pkg file which if you open tries install that OS, but naturally renders an error as you're trying to install an older OS on a newer OS. (Boot Camp on OS X 10.8 Mountain Lion through macOS 10.13 High Sierra can run Windows 7. ![]() They say to use Terminal to use a /createinstallmedia command, but are referring to an Install app in the Applications folder, which just does not exist. If you plan to install macOS 11.0 Big Sur, due in fall 2020. ![]() Their instructions to actually make the bootable USB drive using that. guest on VirtualBox with unmodified macOS installation files downloaded. There are instructions online for how to get a hold of the install files for older macs, such as. Push-button installer of macOS Catalina, Mojave, and High Sierra guests in. Developer & Publisher: Apple Operating System: macOS X 10.9 or laterSetup Detail: macOS High Sierra 10.13. My current mac is a Mini 2018 running macOS Big Sur, and this computer is the one I have to make this bootable USB installer for my older mac. In short, I have an older Macbook Pro mid 2010, for which I've forgotten its login, so I have to, and want to, just do a fresh install of the latest OSX it can run, which is High Sierra.
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