Hi Marcus.
iMac must be 2012 or newer to run Mohave.

Here is the list:

Apple has said that any Mac introduced in mid-2012 or later will support macOS 
Mojave, along with the 2010 and 2012 Mac Pro models if they have a Metal 
capable GPU. That’s fairly descriptive, but if you want a specific list of 
supported Mac hardware for macOS Mojave 10.14 then the following should be 
helpful to you:

MacBook Pro (mid 2012 and newer)
MacBook Air (mid 2012 and newer)
MacBook (early 2015 and later) 
iMac (late 2012 or newer) 
iMac Pro (2017 or newer) 
Mac Pro (late 2013 or newer, or mid 2010 and mid 2012 models with Metal capable 
GPU)
Mac Mini (late 2012 or newer) 
> On 21 Oct 2018, at 6:23 pm, Marcus Harris <cryptodo...@me.com> wrote:
> 
> Hi,
> 
> I’m uncertain if I may upgrade my 2009 iMac 27 from High Sierra to 
> Mojave..and is there a benefit.
> When I checked the App store Mojave doesn’t present as an upgrade.
> The specs are as follows-
>   Model Name: iMac
>   Model Identifier:   iMac10,1
>   Processor Name:     Intel Core 2 Duo
>   Processor Speed:    3.06 GHz
>   Number of Processors:       1
>   Total Number of Cores:      2
>   L2 Cache:   3 MB
>   Memory:     8 GB
>   Boot ROM Version:   IM101.00D0.B00
>   SMC Version (system):       1.53f13
> regards
> 
> 
> 
> Marcus
> Marcus Harris
> P.O. Box 7135
> Shenton Park
> Western Australia 6008
> Australia
> Cryptodome Pty Ltd
> cryptodo...@me.com <mailto:cryptodo...@me.com>
> Mob: +61 (0) 417965618
> 
> 
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Regards,
Stephen Chape






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