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Are you getting the UNTRUSTED_CERT_TITLE error during MacOS Recovery

Are you getting the UNTRUSTED_CERT_TITLE error during MacOS Recovery

So my cousin called me out of the blues trying to find a way to reinstall her Macbook from scratch.  When she ended up with this error UNTRUSTED_CERT_TITLE.  So I pulled up my notes and figured out how to fix this particular error and I found this.

So if you ever bump into this issue, the problem is actually because of your computer wrong system time.

So the solution is pretty simple, because when I checked the time on her system, it was set to 31/12/2001, let’s start from the beginning.


Are you getting the UNTRUSTED_CERT_TITLE error during MacOS Recovery

Step 1

Start by turning on your Mac-book and as soon as your press that power button your next step would be to press & hold Command + R.


Step 2

The next thing you have to do is go to Utilities then click on Terminal.



Step 3

Once you get here, you can do a few things.

  • Type “date”  (without the “” part)
    • It’ll display the system’s current date, chances are if you are getting the UNTRUSTED_CERT_TITLE error, you should see a very old date. let’s say “31/12/2000”
  • Ok now in order to fix this, the command to enter is “`date MMDDHHMMYY` (M=Month, D=Day, H=Hour in 24-hour notation, M=Minute and Y=last 2 digits of year).”
    • Take note that the code is “date MMDDHHMMYY”  (without the “”)
    • Type “date” again to make sure it has been updated.



Step 4

Once you are done updating the date, make sure you Quit Terminal and it should land you back to the previous menu

Quit Terminal


Step 5

You should be able to reinstall your macOS now.

Main Command R Menu


Are you getting the UNTRUSTED_CERT_TITLE error during MacOS Recovery


If it worked, please share the love.  Hopefully your issue with your UNTRUSTED_CERT_TITLE has been resolved.


Ani C
July 20th, 2018 at 2:08 pm

Thank you thank you thank you thank you!!! From the bottom of my heart. You are seriously the best ever!!! I was trying to desert my computer and was searching far and wide online for the best answer. Everyone had the same answer, but you inserting screenshots and the fact that I didn’t have to include “” helped soooo much. Thank you so much!

September 13th, 2018 at 6:30 am

You’re very welcome.. 🙂

September 3rd, 2018 at 4:50 pm

Thank you a million times over

September 13th, 2018 at 6:30 am

Welcome, welcome, welcome… 🙂

October 5th, 2018 at 10:21 am

Thank you! Worked but now I don’t show a disk to save to. UGH

October 19th, 2018 at 8:22 am

Welcome Welcome….

December 29th, 2018 at 9:07 am

Thank you for these instructions they were extremely helpful and saved me a lot of time. One suggestion is to update the instructions to inform the user for the “date MMDDHHMMYY” command, the “MMDDHHMMYY” actually needs to be the date and time they want to update the date/time to be. Completely a suggestion, this is a gold mine of a find and it is going in my favorites.

February 20th, 2019 at 10:20 am

You saved the day for me! This worked!

March 18th, 2019 at 7:34 pm

you rock sir. Thank you

March 21st, 2019 at 4:57 am

THANK YOU! I upgraded my memory and was having this issue but this helped me!!

March 25th, 2019 at 7:19 am

Worked!! Thank you so very much!

August 5th, 2019 at 12:39 pm


August 9th, 2019 at 6:42 pm

Thank you so much. It was very useful

August 14th, 2019 at 11:43 pm

It was not working… What should I do?

August 17th, 2019 at 4:46 am


August 17th, 2019 at 4:47 am


August 18th, 2019 at 10:15 pm

Thank Brother Solved my Macbook

Nick Quayle
August 21st, 2019 at 3:13 pm

Frickin awesome sauce dude yahoo!

Frank Heger
August 28th, 2019 at 5:10 pm

Worked like a charm! I’m pretty good with a PC but not with MacOS. Thank you so much!

August 30th, 2019 at 7:49 am

champion. this saved me so much time – thank you!

September 9th, 2019 at 10:34 am

you’re amazing! thank you!!!

Kate Binder
September 9th, 2019 at 11:41 am

add me to the chorus, really appreciate this info!

September 12th, 2019 at 11:10 pm

Thank you wonderful wise man sir!

Cersei Lannister
September 16th, 2019 at 6:39 pm

I was reinstalling Mac OS as I was about to sell this computer to some one. problems after problems. a bad guide on mackeeper told me reinstalling macOS after erasing was optional (it wasn’t, you just get a folder with a question mark). After taking forever to redownload it.. reinstalling it got that cert error.. yet another problem! thank goodness for your guide. Finally got it reinstalled and ready for shipping!

Nicholas R.
September 27th, 2019 at 5:20 pm

i’m currently waiting on the OS to be installed on the HD, but this is the only thing that has worked for me. THANK YOU SO MUCH!!! I appreciate you, internet hero.

November 25th, 2019 at 9:36 am

Thanks Nicholas.. much appreciated.. 🙂

November 5th, 2019 at 12:31 pm

Thanks a bunch!

November 7th, 2019 at 2:34 pm

If your Mac is connected to the internet and you are too lazy to type in the date yourself, I find this method way easier: sudo ntpdate -u

November 25th, 2019 at 9:35 am

Sweet, thanks for the information hopefully that maybe able to help others.

Antonio Alaniz
December 12th, 2019 at 7:57 am

Holy crap dude. Thank you so much! Worked great!

December 12th, 2019 at 8:02 am

I’m glad it worked.. 🙂

JE OBrien
December 12th, 2019 at 1:56 pm

Works like a charm. Thank you very much. You have a fortunate cousin.

February 16th, 2020 at 7:02 am

02 Feb 2020 still works
Thank you so much

Dan Hertlein
February 20th, 2020 at 1:35 pm

Feb 20th 2020. It works. Thank you so much!


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