Why can’t I upgrade mac OS? | #mac | #macos | #macsecurity


I am a new mac user, and am still getting used to the different way things work.  The main reason I 

switched to mac was their reputation for security.  One of my friends sold me an older mac to get 

me started.  

 

So now I have an 8 year old mac with Mojave 10.14, which I would like to upgrade to a newer OS.

However, I was told by another friend that I cannot upgrade to the latest OS.  Is this true?  I can

understand if there was a difference, for instance 32 bit and 64 bit, like Windows versions.  



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