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I have an iMac 20" 2.4GHz Core 2 Duo (Early 2007)
I want to get the new updated MacOS Sierra on it. It won't let me! So is there any other way to go around this other than the app store?
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I'm working on it. Keep you eye on this question. I've been sick the last week or so due to new medications but should be back at it shortly:
Installation of High Sierra 10.13 on unsupported Macs
However, I don't believe I'm going to able to do it on the early 2008 machine and earlier. I'll be going for a 2008 MacPro first.
Lat year I got the early 2009 machine to Sierra and it was not supported, so we'll hAVE TO SEE.
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I had a early/mid 2009 Mac Air. Installing Mavericks was doable. But the thing crawled. Startup was a healthy(?) 4 minutes. Nothing was usable when running it. I had to revert to Mountain Lion to have a usable computer. To paraphrase Dr. Ian Malcolm, "we are preoccupied on if we could do this instead of if we should." :-)
@mayer - Don't forget your Mac Pro has a Xeon CPU (64bit) where as the iMac in this case has a Core 2 Duo 64bit internally and 32bit externally and only has a 32bit BIOS (EFI).
@danj I started this because Apple pulled support for Sierra on my Mac Pro 2009 2 x 2.93 Quad-core Xeon. All it really needed was a firmware bump from 4,1 to 5,1.
@mayer have you tried a patched kernel?
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Sadly this is just not possible! First the Core 2 Duo based systems are only 32bit and you need a 64bit chip (i Series) & 64bit clean BIOS (EFI).
Even if you could get it to run using a thunker service (I don't know of any) you would run into RAM and graphics limitations.
Time to get a newer system if you really need the newer OS.
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This is unfortunately the only solution.
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Your systems specs: iMac 20" 2.4GHz Core 2 Duo" Alum (Mid 2007)
por Dan