Hi Peter,
I can’t comment on your application software but your iMac can do this.

SOFTWARE

Original OS     Mac OS X 10.5.6 (9G3556)
Later OS        Mac OS X 10.6 (10A432)
Maximum OS      OS X 10.11.6 (15G31)


> On 5 Jul 2020, at 4:05 pm, Peter Faulks <[email protected]> wrote:
> 
> I have
> Model Name:    iMac
>  Model Identifier:    iMac9,1
>  Processor Name:    Intel Core 2 Duo
>  Processor Speed:    2.66 GHz
>  Number Of Processors:    1
>  Total Number Of Cores:    2
>  L2 Cache:    6 MB
>  Memory:    4 GB
>  Bus Speed:    1.07 GHz
>  Boot ROM Version:    IM91.008D.B08
>  SMC Version (system):    1.36f3
>  Serial Number (system):    WQ9050FJ0TF
>  Hardware UUID:    0B8662FA-4D6C-5E43-8003-03E5FF3FC085
> 
> But I use Adobe CS3 (Photoshop, Dreamweaver etc) and Office which I use 
> extensively
> 
> will these still run if I upgrade and which upgrade would be most suitable?
> 
> Peter Faulks
> 
> -- 
> Peter  J Faulks
> BA Soc. Sci,  Grad Dip Ed (Sec), Cert IV AWT, (IAP,  FASSA)
> 
> Unit 1, 9 Newsam Close
> PARKWOOD  WA  6147
> 
> Phone:                +618 9457 0747 (h)
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> Irene Mobile:         0439 933 404
> 
> Email:        [email protected]
> Web Page:  http://www.peterfaulks.net/
> 
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