Upgrade to Big Sur

Thanks for answering. What I find puzzling is that I cannot find out (so far) WHY my particular iMac is 'incompatible' with Big Sur. Is it public (published) knowledge which particular bit (or bits) of hardware are incompatible with Big Sur? Or, is it some sort of commercial 'secret'?

Hmmm... That is what I thought. Apple have taken the decision to keep secret why software 'upgrades' are not allowed for certain models: they just block them.

I'm surprised that all the Governments around the world allow this to happen, including the US.

How many people are likely to be 'bored' learning that their hardware will no longer be supported?

"In any case, knowing the details wouldn't change anything."

I think that depends on what the details were...

There is a clear winner here, and it isn't the consumer or the planet. Without being informed of the reasons it is impossible to know whether it is something to be regarded as inevitable and reasonable (such as the move to 64-bits), or something else (possibly quite trivial).

There are knock-on effects, too, such as third-party software suppliers deciding not to support 'obsolete' operating systems... It all becomes a money-go-round...

"Feel free to send feedback to Apple if you feel they are hiding something from you."

Thanks for your help and the suggestion. I will...