Hi Kaye

Though it shouldn’t really affect it when it’s “off”, but a couple fo things to 
try/check - 
In System Preference - Energy Saver. Untick “Wake for Network access”. If it is 
ticked.

Also try an SMC reset. On the iMac, this is to shut it down, unplug all the 
cables including the power cable from the back of the iMac. So nothing at all 
is plugged in. Leave it off for a few minutes, then plug things back in and 
start it up again. This will reset the Power Management etc. Incase there’s 
something “playing up” there.

Try those two things and see if it helps.

Oh, and another thing to check. Do you have any devices in System Preferences - 
Bluetooth that aren’t being used. I once had a rogue bluetooth keyboard that 
was in a cupboard that did strange things to a computer as it was still on and 
connected, but no longer used. Removing it from Bluetooth resolved a lot of 
“weird happenings”.

Just a few thoughts before you go in a ghost remover :)
Kind regards
Daniel
---
Daniel Kerr
MacWizardry

Phone: 0414 795 960
Email: <daniel AT macwizardry.com.au>
Web:   <http://www.macwizardry.com.au>


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> On 21 May 2020, at 9:47 pm, kaye and geoff <k...@kgweb.org.au> wrote:
> 
>> Time to review the X-Files?
>>> ...Where are Fox Mulder & Dana Scully when you need them?
>>> 
> I'll do some experiments - pull out the ethernet connection, for example, or 
> change the port on the modem. If I find out anything that explains it I'll 
> let you know. 
> 
> Cheers, Kaye
> 
> ------------------------
> Kaye and Geoff
> k...@kgweb.org.au
> 
> 
> 
> 
> 
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