Related Article: How to reinstall macOS

I am unable to install Mac OS on a used IMac I purchased

the Recovery server could not be contacted

iMac Pro (2017)

Posted on Sep 11, 2023 9:18 PM

Reply
3 replies

Sep 12, 2023 4:12 AM in response to LeoM1496

1. Start up from macOS Recovery

Option-⌘-R

Upgrade to the latest macOS compatible with your Mac.


APFS won't work for Sierra, Sierra needs MacOS Extended Journaled. High Sierra won't work for APFS on earlier Macs.


What has often worked for others is to use this Restore Method instead of CMD+r keys...


Option-⌘-R

Upgrade to the latest macOS compatible with your Mac.


2017 iMac failing to install Sierra in re… - Apple Community

Clean Install of High Sierra: Multiple Fa… - Apple Community





I am unable to install Mac OS on a used IMac I purchased

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