![]() Out of curiosity, just now I also tried downloading 10.11.6 and got the same "Install failed with error: Update not found" error message. See also: How to Downgrade a New Mac to Mojave From Catalina, Xcode 11.4 and Swift 5.2.ĭropDMG Installer Mac macOS 10.15 Catalina Software Update So I’m trying to go with the external boot volume thing next … And the rescue system brings up 10.15 (or 10.10). ![]() No simple “download installer and put it on a partition” □♀️ Wasted hours.Ī problem is that the Mojave installer doesn’t run on Catalina, can’t be used to install it on a different partition from within 10.15. You can’t imagine how hard it is to rebuild a working 10.14 dev install. Eventually I did, Xcode 11.4 told me I had to. I was refusing to install Catalina on my machines for a loong time, living on 10.14. Update (): There are some questions about which old versions this works for. These installers can be used with DropDMG’s Create macOS Install Disk command. Oddly, specifying either 10.14 or 10.14.0 works, but to download Catalina you need to specify 10.15 or else it will fail with an “Update not found” error. % softwareupdate -fetch-full-installer -full-installer-version 10.14.6 The -fetch-full-installer flag has a sub-flag: -full-installer-version which allows you to download a specific version. This is extremely useful for many admin tasks. Will download the latest ‘Install macOS’ application to this Mac’s /Applications folder. ![]() The softwareupdate command has gained a new option in Catalina: % softwareupdate -fetch-full-installer Catalina “softwareupdate” Can Download Old Installers ![]()
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