Hi Severin

You can turn off DVD Auto launch as follows - 
Open DVD Player. Go to the DVD Player menu then Preferences.
Under the Player tab, where it says “When a disc is inserted” un-tick “start 
playing disc”.
It used to be a setting you could change in System Preferences, but it’s 
generally removed on my systems with no DVD player.

But that should stop it for you.

Try that and see how you go.

Kind regards
Daniel

Sent from my iPhone 7

---
Daniel Kerr
MacWizardry

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Email: <daniel AT macwizardry.com.au>
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> On 28 Oct 2017, at 3:37 pm, Severin Crisp <[email protected]> wrote:
> 
> When I changed my iMac to Fusion Drive the SSD took the place of the built in 
> optical drive.  It is replaced by an external optical drive.   On inserting a 
> DVD i get the expected error message for the Apple DVD player.  I would like 
> to physically remove the DVD player and its preferences but of course it is 
> locked in as part of the OS.   How can I do this?  
> looking ahead to future system upgrades can I stop a reinstallation of the 
> DVD drive?  
> Severin Crisp
> ____________________________________________________
> 
>              Assoc Prof R Severin Crisp, FAIP, FIP, CPhys
> 15 Thomas St, Mount Clarence, Albany, 6330, Western Australia
>                   ph (08) 9842 1950 ( Int'l +61 8 9842 1950)
>                            mail to: [email protected]
> ____________________________________________________
> 
> 
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