Neither Photoshop CS6 Extended (not CC) nor OS 10.10.2 seem to recognize AVCHD files on a camera card?
Yet, iMovie will import them -- apparently for use in iMovie only. The quality as seen in iMovie is poor and the program is inferior to even the simplified video editing facility in CS6.
How do I get access to these video files in the highest possible quality and bring them into CS6 Extended for editing?
I don't think AVCHD formats like M2TS files are supported, out of the box anyway. I know Sony Creative's apps like Vegas and Vegas Movie Studio can open them natively since it's their format to begin with.