Maxp123

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Username: Maxp123
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How to create a bootable macOS Catalina installer on a USB drive

Maxp123

October 2019

Mike Wuerthele said:

onicon said:

The "quoted" command is incorrect. Wrong: »sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia—volume /Volumes/USBdrive —/Applications/Install\ macOS\ Catalina.app« Correct: »sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/USBdrive --/Applications/Install\ macOS\ Catalina.app« The use of em dashes instead of two hyphen-minus characters will result in the command not working, as does the omission of the space between "createinstallmedia" and the first two hyphen-minus characters.

Nope. It works fine. You can see it works in the attached screenshots.

I appreciate what you're saying and why.

Copy & Paste of either of those did not work for me but this did....

sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled