Bought a new Macbook Pro and installed Lightroom CC onto it.
After importing my Catalog & Presets (I use VSCO) from my old computer (2012 Macbook Pro with Lightroom CC as well), I realised that the color tone of the images changed tremendously compared to the original edits.
The most likely cause of this, in my opinion, is that the monitor on the new computer is not properly calibrated. (Could also be the old computer did not have the proper calibration)
Weird thing is, the Previews of images still show the right tonality from my orignal edits. Once I go into the Develop module, Preview stays for half a second and it changed to a new lighter, faded tone.
When Library and Develop don't match, it's usually caused by a defective monitor profile.
As troubleshooting, and as a (temporary) fix, you can set the monitor profile to sRGB as described here:
If this fixes the problem, you should ideally calibrate your monitor with a hardware calibrator.
Tried calibrating the screen with hardware calibrator. I used the Colormunki Display.
Side note, color accuracy of the new Macbook Pro out of the box was pretty spot on. Bout 95%.
What about the calibration on your old computer? If that was off, it could easily cause the problem you are seeing.
Try disabling the GPU: Preferences > Performance, uncheck Use graphics processor.
If that doesn't help, see this thread:Lightroom Library shows false contrast
In reply #5, trshaner writes
This is generally caused by applying excessive Sharpening and/or insufficient Luminance Noise Reduction settings. See this post for more information: Loosing detail and blacks when exporting final image
Check whether auto tone is enabled by accident in Preferences->Presets. Disable all the auto tone options there. Also hit "reset all default Develop settings" there. I see lots of settings in the grayish version that are consistent with its look:
Especially that blacks +25 will get rid of all your contrast and deep dark areas.
The high contrast one doesn't have the settings embedded so I can't compare but my guess its some default or auto tone that gets applied.
P.S. i would consider the high contrast version to have too much contrast. The shadow areas on the lady's face are rather plugged up. At the same time it doesn't have any real black in it and the image doesn't use the full range either. That might be simply style I guess but I am curious if there is not a calibration issue too on the old machine.
Looks like a calibration problem. The parameters inside of Lightroom should not change because of a new machine. But you changed the screen!
Tried all the possibilities suggested guys and they helped me to narrow down the actual fault!
PROBLEM FOUND : The presets I copied forward from my old computer were LR4 presets. I've upgraded my old computer's Lightroom from 4 to CC earlier during the year, and strangely the presets were all good.
Went into my VSCO account to redownload all the presets and reinstall them again.
PROBLEM SOLVED. Colour tone changed back to the exact tweaks I had in the old computer. So preset version was the culprit!
Thanks again for the input folks! You rock!!