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I cant reinstall my Mac OS it says “The installer information on the recover server is damaged”

Please help me What to do. I erase my mac hd. And now I am getting

““The installer information on the recover server is damaged”

I tried going to disk utility to erase it again but it has lots of drives I see compare to the first time I do a an erase.

please help

MacBook Air 13″, macOS 10.15

Posted on Apr 1, 2021 1:49 AM

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Question marked as Best reply

Posted on Apr 1, 2021 2:46 AM

Hi it says after doing the date reset

“ UNTRUSTED_CERT_TITLE”

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8 replies

Apr 1, 2021 2:12 AM in response to abe294

To erase the drive open Disk Utility on your Recovery Drive, click on View in the menubar

and select Show All Devices.

Highlight the Disk not any of the indented Volumes and click Erase.

Give the Disk a name.

Format: APFS

Scheme: GUID Partition Map.

Click Erase.

When Done quit Disk Utility.


The certificates for several of Apples OS's expired in October 2019, Apple have not bothered getting these updated on 

theirr Recovery Servers with valid certificates. 


This may be the problem you are experiencing. 


Try this workaround, we are going to set the time and date on your mac to a date previous to the expiry date of the certificates.


Connect your mac to your router via cable, not WiFi


Boot to your Recovery HD, click on Utilities in the menubar select Terminal.


Make sure WiFi is switched off, it can reset the date back to today.


Enter a new date, for example or just copy and paste


sudo date -u 011421002017


press Return

enter your password

press Return


If Terminal returns an error saying sudo : command not found, then try again without sudo.

just enter 


date -u 011421002017


press Return


You won't be prompted for a Password if you did not need to use sudo


Once the date has changed you can quit Terminal.


Now try downloading the OS.

Click on Install OS, press Continue.


If this works then when the OS is installed and booted up you can Open System Preferences> Date & Time

and reset the time back to today.

Apr 1, 2021 5:36 AM in response to abe294

Okay I thought your mac was trying to install macOS High Sierra, after all you are writing in the macOS High Sierra

community. Oh how foolish of me.


The instructions for erasing and formatting your mac were for macOS High Sierra.

Your mac is trying to reinstall macOS Sierra. Sierra cannot be installed on an APFS formatted disk.


Quit the installer and go back to Disk Utility.

Click View in the menubar and select Show All Devices.

Highlight the Disk not any indented Volumes, click Erase.

Format: Mac OS Extended (Journaled)

Scheme: GUID Partition Map.

Click Erase.

When Done quit Disk Utility.


Now go back and follow the instructions for resetting the dat and time as above.


I cant reinstall my Mac OS it says “The installer information on the recover server is damaged”

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