I'm a bit confused by your post on what you are trying to do here. Are you trying to boot into Recovery Mode to install macOS to an external USB drive or are you trying to boot from a macOS USB installer to install macOS to the internal drive?

Is it possible to make a bootable USB stick to install El Capitan from a Mac Running Sierra? I need to make an installer for another older Mac. I know I should have done it before I upgraded to Sierra - I ran into printer compatibility issues with Sierra. Turns out Brother doesn't have drivers for Sierra, but does for several older versions of OSX. As has been the case for the last few releases of OS X, the easiest method to make a USB install drive is with the free program, Diskmaker X. It’s been updated today to support El Capitan. 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. Using this tutorial you will.

Here are the instructions for creating a bootable macOS USB installer:

Make Bootable Usb Windows 10

Make sure to carefully read the section regarding macOS 10.11 as there are extra steps required to extract the real installer from the downloaded .dmg archive to the Applications folder. After running the .pkg file from the mounted .dmg file you can then proceed to use the command line to create the bootable macOS USB installer itself.

Macs are very picky about the drives used for booting a Mac plus the quality of many USB sticks is extremely poor so try using another USB stick especially a different brand.

El Capitan Make Bootable Usb Free

When erasing the drive make sure to select the whole physical drive within Disk Utility and erase the physical drive as GUID partition and MacOS Extended (Journaled). The physical drive should be the top most item which is usually identified by the make & model of the drive itself.

El Capitan Make Bootable Usb Windows 7

El Capitan Make Bootable Usb Windows 10

El Capitan Create Usb Boot Disk

Aug 21, 2021 12:52 PM