AG70

Q: OS X Yosemite installation failed

Hi,

 

On my Mac mini Mid 2010 I have downloaded OS X Yosemite and after installation start I am receiving the error "This copy of the install OS X Yosemite application can't be verified. It may have been corrupted or tampered with during downloading".


OS X 10.9.5 is currently installed on my Mac.


Thanks for any help,

Asaf

iPhone 5, iOS 7.0.2

Posted on Oct 20, 2014 10:11 AM

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Q: OS X Yosemite installation failed

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  • by majikulapple,

    majikulapple majikulapple Aug 30, 2015 3:11 PM in response to AG70
    Level 1 (10 points)
    Aug 30, 2015 3:11 PM in response to AG70

    RAM change worked for me. I pulled the 8GB of RAM and put back the original 2GB RAM. BTW, they are exactly the same make (Samsung), and type of RAM, even made in the same month and year. I can't explain why it made a difference. So far I've upgraded 3 Macs (Two Mac Minis and one MacBook Air) to Yosemite. The Macbook Air upgraded flawlessly. The Mac Minis required RAM swap.

     

    In all three, Yosemite has been great, and new features aside, improved performance noticeably. I am very pleased. I have another planned and I'll post results. The next one also has an 8GB upgrade and running Lion 10.7.5.

     

    This was a great tip. Thanks!

  • by Giovanni Vicentin,

    Giovanni Vicentin Giovanni Vicentin Feb 19, 2016 12:02 PM in response to AG70
    Level 1 (4 points)
    Feb 19, 2016 12:02 PM in response to AG70

    I had today the same issue here (Feb 2016). Do this:

     

    Open the terminal in the install screen, and type: date

    After this you need put the actual date in your computer like this:  Date 0218175016 (monthdatetimeyear) String of numbers = month02, date 18, time 1750, and year 16, combined.

     

    After this is done, i work for sure. My macbook have an memory upgrade and dont have a battery. Is this simple to solve it hehe.

     

    Hope this help other people.

     

    Cheers

  • by ReggieSA,

    ReggieSA ReggieSA Mar 10, 2016 5:06 PM in response to AG70
    Level 1 (4 points)
    Mar 10, 2016 5:06 PM in response to AG70

    I had the same problem for str8 3days... until I discovered that my yosemite installer was kind of outdated, released in 2013 so what I did was open terminal via recovery and change my date to 2013 then restarted the restarted the process then it just worked like magic

  • by ReggieSA,

    ReggieSA ReggieSA Jul 3, 2016 7:54 AM in response to AG70
    Level 1 (4 points)
    Jul 3, 2016 7:54 AM in response to AG70

    Solved!!!

     

    Seems like ur installer is old so in order to get it verified you must change the date to an earlier date with terminal eg...on the 3 of June 2016 I got the same problem then I changed the date to 3rd June 2012 then it installed smoothly

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