I have iMac (21.5-inch, Mid 2010) but the os is no where to be seen and I need to use it as a monitor I have tried re installing os but my MacBook is on Mac OS senoma so I have no idea what to do
and when I turn it on it goes straight to the Mac OS utilities and when I try reinstall the os on the utilities page it says It can not contact the server even though it is connected to wifi
Earlier displays & monitors
Start up from macOS Recovery
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
In Disk Utility>View, select Show all Devices, highlight the top left entry.
Run Disk First Aid on all items in the left panel, from top down.
APFS won't work for Sierra or earlier, Sierra or earlier needs MacOS Extended Journaled. High Sierra won't work for APFS on earlier Macs.
If all else fails...
High Sierra “The Recovery Server Could No… - Apple Community
Use http:// instead of https://
https://www.youtube.com/watch?v=ouNQS36dIBw&t=95s
The formula for caos: APFS+macOS High+EFI… - Apple Community
How to recover a Deleted Hard Drive durin… - Apple Community
You realize you cannot use that iMac as a display for a Mac running Sonoma, right?
Ah, good catch... how'd I miss that???
iMac (21.5-inch, Mid 2010) not installing os
