And whilst downloading the update, it appeared to be stuck for a very long time, on 75% complete.I left it to sort it self and when I came back after half an hour it appeared to have completed.
It was just now, when I wanted to process some images, that the problem appeared, when you slide the cursor from left to right, the screen does not change smoothly, but flickers.
When for example you slide the Darkness control to the left, the image does not go properly dark but flickers away whilst in motion and you do not attain the max effect
ALL of the controls for processing from Highlight to Shadow to Colours, appear to be affected, what on earth has happened???
I suggest that you go to your Lightroom preferences, performance tab, and uncheck the GPU option if it isn't unchecked already. Does that make a difference?
Thanks for that suggestion.
I have got a Mac Expert friend, who is coming to look at my iMac on Friday afternoon.
He reckons I probably have a "Corrupt Install"
It appears so, looking at the way that it got stuck at 75% Completed, for half an hour.
I am NOT...very savvy on these things and if I attempt to correct it my self, I may make things much worse.