I think I found it ?
Opened App store, clicked on “Featured”.
There is a button “macOS High Sierra”.
Haven’t tried to hit download yet.


Cheers
Walter
> On 6 Oct 2017, at 18:14 , FW <[email protected]> wrote:
> 
> Hi Ronni,
> 
> Thanks for the list.
> According to that list the 2 iMacs should be suitable.
> 
> Cheers
> Walter
>> On 6 Oct 2017, at 18:06 , Ronda Brown <[email protected]> wrote:
>> 
>> These Mac models are compatible with macOS High Sierra:
>>      • MacBook (Late 2009 or newer)
>>      • MacBook Pro (Mid 2010 or newer)
>>      • MacBook Air (Late 2010 or newer)
>>      • Mac mini (Mid 2010 or newer)
>>      • iMac (Late 2009 or newer)
>>      • Mac Pro (Mid 2010 or newer)
>> 
>> Ronni Brown’s iPad Pro 12.9-Inch 256GB
>> 
>> 
>> On 6 Oct 2017, at 5:42 pm, FW <[email protected]> wrote:
>> 
>>> Hi,
>>> 
>>> Just wondering about the High Sierra update ? 
>>> 
>>> Have checked for updates for my  late 2009 iMac (10.12.6) in the App store 
>>> - there is no notification.
>>> It lists updates done in the last 30 days.
>>> Perhaps its too old ? Or has the final version not yet been released ?
>>> 
>>> Then I did the same check in my friends iMac (Mid 2014) . No update appears 
>>> in his app store page either.
>>> 
>>> Confused
>>> 
>>> Cheers
>>> Walter
>>> 
>>> 
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