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Original post by: Dan ,


Your iMac is missing the system software which is why the folder with a blinking question mark is showing up.

Your system might have the ability to do Internet recovery. How about giving it a try! Press either the '''Option -Command - R''' or '''Shift - Option - Command - R''' keys to start up from macOS Recovery over the Internet.

[|Mac startup key combinations]

If that fails you’ll need to create a bootable USB drive or get a SATA to USB adapter so your old drive can be connected to your system.