So doing that both colours came out correctly, even the part of the inserted image that I didn't put over the other one.
I printed the inserted image 5 minutes ago on its own and it looked awful
Yes I have gone from imac to another.
Photo attached - top image is what my prints look like now, bottom was before (same shoot different images but shows the colour difference.)
Only because the power is out! The photo I was printing today was processed last year on old Mac, I hadn't printed it so I will print something tomorrow that I have a copy of already to show you the difference. Won't be until the afternoon sometime.