Black screen for no reason

Chris, Many thanks for that. I will do it if the prob arises again, as my frustrating remedy (hopefully I don't jinx it just talking about it) worked for now.

What I did was : In the Energy Saver in Preferences, I unchecked the 'Put hard disks to sleep when possible' and 'Wake for network access'. Plus I set the 'Computer sleep' to 'Never'.

So far so good. (Hopefully I haven't jinxed this).

But if this black screen affair appears again I will use your 'System Management Controller (SMC) on your Mac' solution.

Many thanks for the advice

Steve aka amalgamsab :D

The black screen problem has returned. Now, even worse.

I've done the SMC remedy repeatedly but black screen is returning now more than ever … even when I'm half way of putting in my password.

Someone suggested it could be a virus but Apples don't get viruses. I've run CleanMyMac a few times and the problem is still there.

Please help.

Steve aka amalgamsab :(

amalgamsab again

My iMac prob has been solved a better way. Because the thing was 10 years old, I’ve purchased a new iMac ... now w better configuration. Then it’ll be a hope that all old software works w Catalina.

Many thanks to all advice re the black screen affair. 👍😸