I have a Sony HDR-HC7 (1080i HDV) camcorder. I've a terabyte of video. It was tranferred to the PC using the free HDVsplit. The resultant files are extention .M2T I bought a MBP recently mainly to edit videos but iMovie etc. fail to import the files. Folks seem to speak about Voltaic (http://shedworx.com/?q=volmac-home) and SheerVideo (https://www.bitjazz.com/en/shop/sheervideo/pro_mac_intel.php) but I don't get it.