#OS X EL CAPITAN DOWNLOAD USB INSTALLER HOW TO#
Mojave: How to upgrade to macOS Mojave – Get macOS Mojave (App Store link)Īs of recently ( October 2019) users have reported a certificate issue that may require the system datetime to be backdated via terminal in the installer. High Sierra: How to upgrade to macOS High Sierra – Get macOS High Sierra (App Store link) As usual, Apple no longer supply a bootable USB Flash Drive with latest OS X releases - including the new OS X 10.11 El Capitan. Sierra: How to upgrade to macOS Sierra – Download macOS Sierra (direct d/l). The app's ressources can be used to create a new installer thumb drive with the well known command: sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app The El Capitan installer is downloaded to the /Applications folder, with the file name 'Install OS X El Capitan.' If you've installed El Capitan and want to create a bootable installer, re-download the installer from Apple.
The installer package installs the "Install OS X El Capitan.app" in the Applications folder.
#OS X EL CAPITAN DOWNLOAD USB INSTALLER MAC OS#
Simply download a new OS X El Capitan install.dmg (with a valid cert chain this time), open the dmg and open the InstallOS.pkg. OS X 10.11 or better known as El Capitan is an operating system released Sept 30th 2015 as the direct successor to OS X Yosemite, the very first Mac OS to use the material design language as known today. You probably used an old macOS installer app to create your USB bootable disk.Ī lot of macOS installer apps downloaded before Oct 2019/Nov 2019 contain an outdated certification chain and thus are invalid.
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