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• #Install mac os x el capitan from usb how to#

#Install mac os x el capitan from usb how to#

How to Create a OS X El Capitan Boot Installer USB Flash Drive OSXDaily. 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. Installing macOS or OS X: What to do when the. High Sierra: How to upgrade to macOS High Sierra – Get macOS High Sierra (App Store link) Sierra: How to upgrade to macOS Sierra – Download macOS Sierra (direct d/l). Now Restart your computer then hold the option key.

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 When you tapped on Quit button on step 4 of creating a bootable USB Flash Drive for Mac OS X. The installer package installs the "Install OS X El Capitan.app" in the Applications folder. 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.

To create a bootable Mac OS X El Capitan USB. Connect your USB flash drive to your Mac and launch Disk Utility. Here is the direct link to download Apples OS X El Capitan installer for your Mac. 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app to create your USB bootable disk.Ī lot of macOS installer apps downloaded before Oct 2019/Nov 2019 contain an outdated certification chain and thus are invalid. With the installer sitting in the Applications folder, move to the next step.