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I have a MacBook Air mid 2012. How do I upgrade the IOS to 10.14?

I have a MacBook Air mid 2012. How do I upgrade the IOS to 10.14?

Posted on Aug 11, 2021 3:47 PM

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Question marked as Top-ranking reply

Posted on Aug 11, 2021 7:02 PM

If you get a corrupted message...

Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...


Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS Mohave App in Applications, so expired Certificates are not expired.


Or... trash the Install MacsOS Mojave.app in Applications, empty trash & restart, then a new copy of a more recent version can be downloaded..

5 replies
Question marked as Top-ranking reply

Aug 11, 2021 7:02 PM in response to Kipsask

If you get a corrupted message...

Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...


Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS Mohave App in Applications, so expired Certificates are not expired.


Or... trash the Install MacsOS Mojave.app in Applications, empty trash & restart, then a new copy of a more recent version can be downloaded..

I have a MacBook Air mid 2012. How do I upgrade the IOS to 10.14?

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