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Model A1311 / Mid 2010 / 3.06 & 3.2 GHz Core i3 or 3.6 GHz Core i5 Processor

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How can I boot on usb after deleting the hdd content?

Hi!

I just got an iMac 2010 for free. I first booted in recovery mode and wiped the HDD, my goal was to reinstall the whole OS.
I succeeded and created a bootable USB key with El capitan on my Windows laptop. When connecting the USB key and booting the iMac, it automatically boots in internet recovery mode (which doesn't work). I can no longer enter in recovery mode.

How can I reinstall the OS. Am I missing one or many steps?

Thank you!!

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In truth you only had a recovery partition in this series not internet recovery.

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May be that's while it fails.. I know I made a beginner mistake afterall

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Sorry you are stuck here.

Let's see if your El Capitan drive is able to boot up your system. It needs to be the startup target to achieve that. You'll need to plug the drive in one of the USB2 ports and restart your system, but this time press the Option (⌥) key on the USB connected keyboard to enter the Startup manager, then continue the setup.

Reference: Mac startup key combinations

If that fails then the USB drive may not be compatible with the older 2.0 USB spec, or the drive's format was not GUID with a Journaled File System which is needed for the drive to work properly.

For Windows systems to have the ability to format a compatible format on the drive will require adding a utility or extension program.

If you have a friend who has a Mac see if they can help you

How to create a bootable installer for macOS

As you can see you do need a mac to then unpack the InstallMacOSX.pkg file into Install OS X El Capitan application. Hopefully you still have this file.

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Vincent Bufotes sera éternellement reconnaissant.
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