When I open and work with images in camera raw, they are too bright. This just started happening about a week ago (I was also gone for a week, so it may have been a 2 week problem) If I adjust them to correct exposure in Camera Raw, they are way too dark in PhotoShop (All most recent CS6 versions) on Windows 7 OS.
Have you updated Camera raw to version 9.1.1?
Also post a screenshot of :-
If this does not carry over into Photoshop, the problem is in the display color management chain on one of the two apps. Perhaps a look at the histogram could tell you which one is correct.
Are you using a calibrator for your display? If so, rerun it, and try different settings (notably v2 not v4, and matrix not LUT).
If not, it could be that you have received a defective display profile through Windows Update. That happens a lot. The simple way to check this is to set up sRGB as default display profile in Windows color management.
Another possibility is a GPU problem. Try to disable it in preferences, in both apps (is it available in ACR for CS6?)