Not sure if the lens profiles are there on your Mac. If not, you could install DNGConverter which will reinstall all the lens profiles.
Does absolutely not help!
I have the same problem here (german version of camera raw, photoshop cc). This is really really annoying and happened with the update to 8.3.!
I haven't noticed any troubles in Windows, but I don't necessarily use the same lens profiles as those with problem, but also I responded to a post by someone else today that had the same problem on a Mac, where some of the lens profiles didn't work, anymore, after updating to ACR 8.3.
They resolved the issue by copying all the lens profile files from the app folder to the user-folder location. This suggests that the profiles are there and work but ACR 8.3 cannot find load some of them when they are in the application folder.
Here is the other message:
I'm sorry. I was completely wrong... just a bad coincidence. To blame is Nik filtersuite...