I just migrated my data from a Macbook to a Mac Mini. Everything migrated over just fine, except now my tool bars in Lightroom 4 Develop Module are all grey, no color in any of the slider bars that had color on my Macbook: like the slider bar for Temp should be blue on the left and yellow on the right, or the Tint slider shsould be green on the left and purple on the right, Exposure should be dark grey on the left and light grey on the right, etc. Now they are all just grey bars on my new Mac Mini (Exposure, Contrast, Highlights, Whites, Blacks, Clarity all just one solid color grey, no gradient. And the Temp, Tint, Vibrance, Saturation, HSL, Color and B&W sliders are all grey, no color on the sliders at all.) Can you tell me how to fix this and have them look like normal? See Screenshot.