Do you know the reason for this issue and how to fix it?
In this post,MiniTool Softwarewill show you the information you want to know.
Why the Recovery Server Could Not Be Contacted on Your Mac?

When this issue occurs, you will see the following interface.
This issue stops you from installing macOS you want to use.
That is to say, it is a common problem.
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The solutions from the internet are various.
Which is the best method to solve this issue?
We have collected some approaches that are proved to be effective.

This post is helpful:If your Mac doesnt connect to the Internet over Wi-Fi.
Click theOKbutton to kill the error interface and you will return to themacOS Utilitiesinterface.
ClickUtilitiesfrom the top Apple menu bar and then selectTerminalto open it.

Typentpdate -u time.apple.comand pressEnter.
The whole process will last for a while.
you gotta wait until it ends.
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After that, you might trying reinstalling macOS again to see whether the issue is solved.
In this post, we will show you some effective solutions.
This article shows you the detailed steps:How to create a bootable installer for macOS.
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Do you know how to delete Time Machine backups on your Mac computer?
In this post, we will show you different cases and different methods.
This time, you should be able to successfully upgrade your macOS.

These are the effective methods to solve recovery server could not be contacted on your Mac computer.
We believe that there should be one suitable method for your situation.
I find the best method to fix the recover server could not be contacted on Mac in this article.

It has a trial edition.
If yes, you might use a full edition to recover all your files without limits.
you’ve got the option to go to the MiniTool official download center to get this freeware.

launch the software.
you’ve got the option to customize the data types you want to recover if necessary.
Click theNextbutton to continue.
A deep scan can help you find more data but the scan process will last longer.
If necessary, you might turn on the button forDeep Scan.
Click theScanbutton to start scanning your selected disk.
When the scanning process ends, the software will show you the scan result byClassic List.
This is the default mode.
you could also switch toFile ListorDeleted Listto find your needed files.
This software also allows you to preview the scan result.
you’re able to go to the MiniTool site to select a suitable edition according to your situation.