coltrane58

Q: unable to run mavericks install

I am trying to upgrade an old iMac that was running OS X 10.5.?. I installed snow leopard and ran update so it is now at 10.6.8. I had a copy of the Mavericks install on another system so I copied that to the old iMac. When I run it I get the following:

"This copy of the Install OS X Mavericks Application can't be verified. It may have been corrupted or tampered with during downloading"

 

I know this install ran on the machine I copied it from. I also tried to run an El Capitan install from a file and got the same message.

 

I did go to the app store and try to download the upgrade from there but that gave me another error that I will put in a separate post.

 

I would greatly appreciate some help

 

thanks

john

Posted on Jul 29, 2016 11:50 AM

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Q: unable to run mavericks install

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