CaseySJ
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This is most likely due to an incomplete download. If you used GibMacOS then please do this:Hi,
Getting an error when trying to install Catalina. Think it goes wrong in step 2 already when I'm trying this step:
I'm getting this:
- Open a Terminal window and type:
- sudo "/Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia" --volume /Volumes/Catalina-USB
/Applications/Install macOS Catalina.app does not appear to be a valid OS installer application.
I'm using this version:
1. macOS Catalina 10.15.7 (19H2)
- 001-51042 - Added 2020-09-24 17:09:31 - 8.75 GB
Anyone knows where this goes wrong?
Thanks,
Daan
- Open the GibMacOS-master folder and look for a sub-folder called macOS Downloads.
- Delete the entire macOS Downloads folder.
- Run gibMacOS.command again and re-download Catalina.
- When it's downloaded, quit and run BuildmacOSInstallApp.command again.
- Copy the new Install macOS Catalina from the gibMacOS-master/macOS Downloads/publicrelease folder to /Applications folder.
- Now try it again.
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