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    MacBook Air early 2015 Catalina Install

    I created a bootable USB and managed to get it working - Thanks FYI for others - doing this method erased all data on my hard drive.
  2. O

    MacBook Air early 2015 Catalina Install

    based on application folder the file is 8.24gb and called "Install macOS Catalina"
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    MacBook Air early 2015 Catalina Install

    The installer file was from going via system pref then software update. I just removed the previous install and downloaded a fresh installer but still have the same message?
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    MacBook Air early 2015 Catalina Install

    I have a MacBook Air 13″ Early 2015 with MacOS Majave 10.14.6. I get the below message when trying to install MacOS Catalina – any ideas? “you must be running macos catalina 10.15 or later to install on this volume” See attached screenshots to.
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