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Another alternative is to find a bootable High Sierra installer on DVD from someone, which can be inserted in the iMac, and selected for booting after starting up with Option (Alt) pressed.
Another alternative is to find a bootable High Sierra installer on DVD, which can be inserted in the iMac, and selected for booting after starting up with Option (Alt) pressed.
Another alternative is to find a bootable High Sierra installer on DVD from someone, which can be inserted in the iMac, and selected for booting after starting up with Option (Alt) pressed.
Another alternative is to find a bootable High Sierra installer on DVD, which can be inserted in the iMac, and selected for booting after starting up with Option (Alt) pressed.
