I have Photoshop CS6 (it wont let me update it any higher) and I have upgraded to the RAW 7.1 but it still will not read RW2 files. Any suggestions?
8.3 is the latest ACR for CS6 Go to Help > Update...
Try Help->Update again after deleting following folder contents:
/Volumes/%Volume Name%/Users/%Username%/Library/Application Support/Adobe/AAMUpdater/1.0
or Home icon /Library/Application Support/Adobe/AAMUpdater/1.0
Delete folder 1.0 contents.