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Apple Computing Products:
macOS - Operating System
Creating a Bootable Installer for MacOS
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<blockquote data-quote="Mark F" data-source="post: 1812605" data-attributes="member: 301631"><p>Apple has published a guide to creaeting a bootable installer: <a href="https://support.apple.com/en-us/HT201372" target="_blank">https://support.apple.com/en-us/HT201372</a>. I'm attempting to create a High Sierra bootable installer on a 16gig flash drive so that I can then create a virtual machine to run under Parallels. I need to do this as certain legacy software will not run under whatever succeeds Mojave. </p><p></p><p>Anyway, in order to create the bootable installer Apple first directs that the installer be downloaded from the App Store which I have done, and it is sitting in Applications as Install macOS High Sierra, exactly as the document predicts. Then the trouble starts. The next direction is to copy and paste into Terminal the listed command:</p><p></p><p><em>sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume</em></p><p></p><p>But when I do so Terminal gives the message: "Applications/Install macOS High Sierra.app does not appear to be a valid OS installer application."</p><p></p><p>I've uploaded a screen shot of the Terminal window. Does anyone have an idea of what is wrong?</p><p></p><p>Thanks.</p><p></p><p>Additional info: the flash drive is formatted with Extended (Journaled)</p><p></p><p>[ATTACH=full]29204[/ATTACH]</p></blockquote><p></p>
[QUOTE="Mark F, post: 1812605, member: 301631"] Apple has published a guide to creaeting a bootable installer: [url]https://support.apple.com/en-us/HT201372[/url]. I'm attempting to create a High Sierra bootable installer on a 16gig flash drive so that I can then create a virtual machine to run under Parallels. I need to do this as certain legacy software will not run under whatever succeeds Mojave. Anyway, in order to create the bootable installer Apple first directs that the installer be downloaded from the App Store which I have done, and it is sitting in Applications as Install macOS High Sierra, exactly as the document predicts. Then the trouble starts. The next direction is to copy and paste into Terminal the listed command: [I]sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume[/I] But when I do so Terminal gives the message: "Applications/Install macOS High Sierra.app does not appear to be a valid OS installer application." I've uploaded a screen shot of the Terminal window. Does anyone have an idea of what is wrong? Thanks. Additional info: the flash drive is formatted with Extended (Journaled) [ATTACH=full]29204[/ATTACH] [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Creating a Bootable Installer for MacOS
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