How to: Convert AVCHD files for iMovie
“I have a Sony AVCHD camcorder that I don’t always keep at home. I was wondering if there was a way for me to make a copy of its hard drive that I could use with iMovie.”
There is. And you have a few options.
The most obvious option is to simply import everything on the camcorder’s hard drive into iMovie. Neat. Clean. Done.
You can also create a duplicate copy of that camcorder’s hard drive by launching Disk Utility (found in /Applications/Utilities), selecting it in the list of drives and volumes on the left side of the Disk Utility window, and choosing File -> New -> Disk Image From disknumber (where disknumber is the name give to the selected disk). In the resulting sheet choose Read/Write from the Image Format pop-up menu, None from the Encryption pop-up menu, and click the Save button.