And what specifically? What camera? what version of ACR? what is the problem? You need to provide more info/ explain better.
I have a nikon d4 and when I try to open the photos in bridge it says not supported download update. I am using a mac book pro
The Camera Raw 7.1 update included the Nikon D4,
Caution: However I am not sure if that is applicable or a correct version for the Creative Cloud.
Edit: Actually here it says 6.7 included the D4
D4 is also listed here for Creative Cloud.
So since 7.1 was released over a year ago, you would think it would be included or updated further in Creative Cloud to offer proper compatibility? Adobe?
According to the website, the D4 was supported from Camera Raw 6.7 in CS5 and 7.1 in CS6. So, if you have CS6, you should just need to run Updates from the Help menu and you're laughing.
If you still can't read your NEF files, you might need to clear the cache in Bridge. It's also possible that you are using an outdated version of Nikon Transfer, which renders some NEF formats unreadable by Adobe software. Simply replacing this with the latest version will fix the problem.