[Denis O’brien]

Hi,
There is JVC ProHD LOG AND TRANSFER PLUG-IN Version 1.0.1 available from the JVC website

Overview
JVC ProHD Log and Transfer plug-in can be used with Final Cut Pro for editing MP4 clips recorded by JVC ProHD equipments. You can preview MP4 clips and transfer to QuickTime movie file by installing this software.
They also give the following warning:-

Known Issue
If you have already installed Sony XDCAM EX Log and Transfer Plugin Version1.0.0 to your system and then install JVC ProHD Log and Transfer Plugin Version 1.0.1, 720p SP clip recorded by JVC ProHD equipment may not display a thumbnail. To avoid this, please uninstall Sony XDCAM EX Log and Transfer Plugin software by following procedure.
[ How to uninstall SonyXDCAM EX Log and Transfer Plugin ]
– Delete the following folder and file.
/Macintosh HD/Library/Application Support/ProApps/MIO/RAD/Plugins/SonyXDCAM.RADPlug
/Macintosh HD/Library/Receipts/XDCAM EX Log and Transfer Plugin 1.0.pkg