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Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan. Making a bootable usb os x el capitan how to#ĭownload the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan. Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg. Why do you need to download El Capitan through Terminal.Įl Capitan is freely available from this link. Go to Section 4 and click on Download OS X El Capitan. This downloads InstallMacOSX.dmg to your Downloads folder. That and an installation window will open, this does not install El Capitanīut converts the InstallMacOSX.pkg to the Install OS X El Capitan.app which When downloaded open to InstallMacOSX.pkg, double-click on The next section can only be done on a mac that is capable of running El Capitan,Ī mac that came preinstalled with an OS later than El Capitan will refuse to do the next bit. (If the installation window asks which disk you want to install to, you must pick You will find in your Applications folder, it should be 6.2GBs in size. You want to eventually install El Capitan on, that is for later.) The disk that you are booted to at the time. The copy of the install app self deletes after installing El Capitan, so make sure you keep a copy of the InstallMacOSX.dmg To start the installation of El Capitan double click on the Install OS X El Capitan.app. If you need it in future, or you could just make a copy of the Install OS X El Capitan.app prior to installing and moving it toĪn external drive for safe keeping. It is also possible to create a bootable USB installer disk using the Install OS X El Capitan.app In the Applications folder and the createinstallmedia command in the Terminal app. Making a bootable usb os x el capitan how to#.You can now quit Terminal and eject the volume. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey.After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume.Terminal shows the progress as the volume is erased. When prompted, type Y to confirm that you want to erase the volume, then press Return.Terminal doesn't show any characters as you type.

When prompted, type your administrator password.If the volume has a different name, replace MyVolume in the command with the name of your volume. Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. Type or paste one of the commands below into Terminal, then press Return to enter the command.Open Terminal, which is in the Utilities folder of your Applications folder.Plug in the USB flash drive or other volume that you're using for the bootable installer.