Hello,
I’m trying to create a bootable USB thumb drive with OS X El Capitan 10.11 but unfortunately my iMac 20 (mid 2007) doesn’t see the USB device when start the boot manager while holding the “ALT” key. The current OS (Linux Mint 19.3 “Tricia” x64) is able to see the device, (I attempted to create the bootable USB using this iMac running Linux Mint). I was able to flash the USB thumb drive without any errors and it pass the validation with success. The .dmg file was downloaded directly from the Apple’s web site.
Some help will be appreciate,
Guillaume
Hi, are you able to see any files on the usb device? if you can, what are those? It most likely is due to wrong image being written on the drive, either due to incomplete download or data corruption. To confirm file is intact you can compare the downloaded files hash with the one seen of apples website, Check how to guide here.
Hi,
I mount the USB and I took a screenshot of what I’d saw:
Etcher write an .pkg file to the USB thumb drive but initially I’d select an .dmg file from the machine hard drive, the one that I’d download from Apple.
It is normal? What I need to do to get it work properly?
Thanks,
Guillaume
That doesn’t look right. Where did you get the DMG from? Its contents don’t map to an image that is meant to be used to create a bootable drive
Do you have a link from the section of the Apple website from where you got it?
This looks like a program to kickstart the macOS update from an existing macOS installation and not an image with a live system to install the update. Maybe you can find the proper one somewhere in the developer portal?
