$ sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia If I run the installer without specifying a target volume, it works enough to tell me the proper arguments: The last time I downloaded the installer, back in December of 2020, the size was 12 GBytes - and I was able to create a bootable installer.
Windows install disk creator fails download#
This is odd, because it took almost 30 minutes to download - I think for that amount of download time it should have been three orders of magnitude larger. The size of the application is 37,479,165 bytes (20.6 MB on disk).
$ /bin/ls -al /Applications/Install\ macOS\ Big\ Sur.app/ĭrwxr-xr-x 3 root wheel 96 Oct 4 09:35 Install macOS Big Sur.app The application is installed in the usual location: $ sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume
Windows install disk creator fails how to#
I follow the instructions from Apple on how to create a bootable installer The USB flash disk is 32 GBytes, using GPT (GUID partition table), MacOS Extended (Journaled) formatting, and is named "MyVolumes" I downloaded the latest Big Sur 11.6 installer from the Apple App Store. Applications/Install macOS Big Sur.app does not appear to be a valid OS installer application. The error that I receive from the createinstallmedia app within the Big Sur installer is: This is something I have been able to accomplish with all previous versions of MacOS, and even with Big Sur when it was first released. MacOS Big Sur 11.6 will not create a bootable installer I am attempting to create a bootable installer on a USB flash disk for MacOS Big Sur 11.6. Am I missing something here or have Apple changed the goalposts? I know this is an outdated system, but what I'm trying to do here is very basic and it is failing at the first hurdle. I can't make a bootable USB disk either as that involves the creation of the 'OSX El Capitan.app' too.Īny suggestions are greatly appreciated. I have trawled everywhere looking for an answer to this but failed. That download will just not generate the 'ElCapitan.app' file in my Applications to start the installation. I am having the same issue with that one too. One is too new to be compatible, but the other is also running El Capitan. dmg multiple times and also on 2 more different Macs. I know that it should create an 'OSX El Capitan.app' in my Applications folder and that I should install (and select the drive I want to install to) from there, but it just doesn't create that file. When running that it takes me through to an installer, but the file size is only 7MB, so obviously not the OS. If I run the downloaded 'InstallMacOSX.dmg' is opens up to reveal the 'InstallMacOSX.pkg' file. I downloaded a new and official version of El Capitan from the Apple support page, but once downloaded, it doesn't create the 'OSX El Capitan.app' in my Applications folder. I have successfully done this method before with my MacMini when upgrading it's drive to an SSD.
I would like to run the installer as per normal and select the connected SSD when prompted on which on disk to install on. I'm trying to install El Capitan on the SSD, which is connected via USB.
The machine is a 2008 MacBook Unibody running El Capitan (updated from Snow Leopard) The issue I have been trying to solve for hours and hours now is that after downloading El Capitan, it doesn't create the ElCapitan.app in my Applications folder. I've recently decided to liven up an old 2008 MacBook Unibody by buying a new SSD. 'OSX El Capitan.app' not showing in Applications after download.
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