Upload Sony camera video to iPhoto, iMovie on Mac

Do you have a Sony camcorder, the Sony Handycam DCR-SR82, Sony Cybershot  or professional Sony HXR-MC50U? Have a headache on how to import them to iPhoto or iMovie? Yes, the problem is not only for you, many friends like you are meeting the same problem. The concrete example is Hi, "I've searched the forums but couldn't find anything that resembles my problem...I have a 1 month old Sony cybershot w85. After imported 9 rolls in iPhoto successfully, iPhoto says that most files are unreadable...It imports maybe 2 photo's and then i get an error: unreadable files?"