troubleshooting: “UNTRUSTED_CERT_TITLE” Error Message on macOS

  • The problem occurs when your Mac’s system clock is set incorrectly, which leads to a ‘chicken and egg’ problem.
  • If you get the `untrusted_cert_title` error when you reinstall macOS, you need to check that the date and time settings on your Mac are correct.
  • To fix the error, use the Terminal command to set the correct time and date on the Mac calendar.

A Mac user may see an error message while trying to reinstall macOS when untrusted_cert_title is set incorrectly. The system clock can be set incorrectly on a Mac, and if you don’t have macOS installed, you can’t set the clock, and once you have macOS installed, you can install it.

When you attempt to reinstall macOS, you often encounter an error about an untrusted cert title. This defect commonly occurs during the reinstall process, resulting in a failed installation. It’s not a common problem in any particular OS version, but is widespread throughout the entire OS. The problem cannot be resolved until the fundamental cause is resolved before you can continue installing macOS.

Whenever there are conversations about MacOs, talks about how secure, smooth, and error-free it is never far away. However, this is not always the case. Like any other piece of software ever built, MacOS too can run into errors from time to time. What’s worse is that these errors can crop up at any time, unannounced. One such error which occurs during the installation of macOS is the installer information on the recovery server is damaged error. Now, given its long and complicated name, one might assume that this error is tough to fix but the truth can’t be farther away. Our guide on how to fix this particular installer error covers everything from the whys to the hows. So let’s get started and read up on simple fix that you can employ to get rid of this error.

A Macintosh operating system is the official operating system developed by Apple for Mac computers, also known as macOS. It’s based on Unix. Before Apple even existed, Steve Jobs founded a company called NeXT which developed its programs between 1977 and 1985 using Unix technology.

The installer information on the recovery server is damaged high sierra error can also be caused by a compatibility issue between the macOS version you are installing and the hard drive format. As a consequence of the use of a new hard disk format-APFS, compatibility issues have developed for Macs that have been released since macOS Sierra was released.

The ,, Starting Internet Recovery. It may take a while’ message appears when I go to recovery mode on my Macbook Pro (2012). When I click on continue to reinstall macOS Sierra after erasing my hard drive, a small window appears and says,,You will need to verify your computer’s eligibility to download and restore macOS Sierra. After pressing Continue, a new window opens with the message ,,UNTRUSTED_CERT_TITILE”, and I’m stuck.

The data and macOS install partition from my MacBook Pro 13 2017 was deleted when I sold it.

UNTRUSTED_CERT_TITLE might appear when macOS is reinstalled

Why am I getting the `Untrusted_Cert_Title` error in mac?

Nikon camera not reading SD card has been fixed

You might be able to clear the UNTRUSTED_CERT_TITLE by clicking Utilities from the top toolbar and clicking the Terminal button.

If you get the `untrusted_cert_title` error when you reinstall macOS, make sure your Mac’s date and time are correct. In this case, you have an incorrectly set system clock on your Mac, which leads to a “chicken and egg” situation: If macOS isn’t installed, you can’t set the clock correctly, which then allows macOS to be installed.

In order to give a friend a Macbook Pro, I decided to upgrade it to a larger used hard drive after erasing the original disk with the highest security (7 passes) and installing MacOS Sierra. The error occurred when I attempted to reinstall MacOS… (-_Q) after installing the drive and performing the erase/highest security using internet recovery.

Most encryption algorithms require an accurate and up-to-date clock to establish a secure connection. This is because the encryption system wants to make sure that the digital certificate confirming the integrity of the program has not yet expired. If the date and time embedded in the certificate are set before the release date or after the expiration date, it will not be accepted by the encryption system and an error will be issued during macOS installation.

Untrusted Cert Title Apple

As I tried to reinstall MacOS it displays an error ‘Untrusted cert title’. How can I resolve this?’ I followed the instructions on the white question mark and folder, but when I tryed to install MacOS it displayed ‘Untrusted cert title’.

Getting the current date and time for the command you want allows you to fix the Mac’s date and time settings. To complete this task, you need to know the exact date of the month, the numeric equivalent of the month (1 to 12), the current time in hours and minutes, and the year’s last two digits.

How to Resolve the UNTRUSTED_CERT_TITLE problem in macOS?

Untrusted Cert Title Mac

Reinstalling macOS results in the UNTRUSTED_CERT_TITLE error mainly due to an incorrectly set system date and time. It is possible to reinstall macOS to give your Mac a fresh start after fixing the wrong system clock with Mac preferences, Terminal, or Single User Mode. 

In the terminal, run ntpdate -u to set the correct time. Once the time is accurate, run the date command again in the terminal before reinstalling Mac OS.

Changing the system date through the terminal

  1. Click Terminal under Utilities.
  2. By pressing Enter, you will enter the following command.
  3. Current system date can be found by running this command.
  4. There may be some reason for why the date was reset to 2001.
  5. Press Enter to perform this operation.
  6. Replace each bracket with two-digit UTC numbers.
  7. Using your current time and date, this command should look like this – October 30, 2019, 01:15 UTC.
  8. Follow these steps exactly:
    In the date format of 1030011519, enter the following:
  9. If not, rerun the first command and verify that the time and date are set correctly.

Changing the system date and time in Mac Preferences

  1. You can access System Preferences by selecting the Apple menu.
  2. You can find the time and date by clicking on it.
  3. The administrator name and password can be entered after clicking the lock icon.
  4. The date and time can be manually set by clicking Date and time.
  5. Set the calendar to the current date and time by unchecking Automatically set time and date.
  6. The clock hands should show the correct time. Click Save when they are in the right place.
  7. Once you have reinstalled macOS, you should not encounter the same error.

Frequently Asked Questions

This error is due to incorrect date and time settings. Apple servers use your system time to establish a secure connection. Simply put, the servers have failed to validate the operating system certificate due to incorrect system time settings.

  1. Check the date and time.
  2. Change the trust settings for some certificates.
  3. Reset the key chain.

  1. Check the date on your computer.
  2. Check for configuration errors.
  3. Check to see if the domains match.
  4. Get your certificate from a trusted CA.
  5. Check the certificate structure.
  6. Check for revocation.

  1. Reboot your Mac and install it again.
  2. Set your Mac to the correct date and time.
  3. Create enough free space on your drive to install macOS.
  4. Download a new copy of the macOS installer.
  5. Reset the PRAM and NVRAM memory.
  6. Run First Aid on your startup disk.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.