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I have created bootable pen-drive using installer. I performed following Steps but it failes.

  1. Erase the Hard-disk from disk utility.
  2. restart the iMac (hold down - Option key)
  3. it shows me the pen-drive (but i select the pendrive prohibited symbol display.)

Note: same pen-drive works in other macs. no issue in startup one more thing i cant even see my internal hard-disk as startup disk list

Any help would greatly appreciated.

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    Can you tell us which iMac model you‘re trying to install it on? Have you confirmed it‘s compatible with High Sierra? – Kevin Grabher Nov 30 '17 at 12:40
  • yes it's compatible with High Sierra. because i already installed High on that, but due to my SSD failed i replace it with new hard-disk, after that problem is occured – Jaydeep Vyas Dec 1 '17 at 4:31
  • i can show my hard-disk in Disk Utility, but cannot listed in when i try to install os using bootable pendrive – Jaydeep Vyas Dec 1 '17 at 4:33

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