Hi,
To all those having (like me) problems importing the 1080P50/60 movies from an HDC-TM700 into FCPX, this is what I have found to work without using a 3rd Party converter in case you also have a Windows PC available.
1. Close FCPX on your MAC
2. Connect camera to your MAC
3. Copy the entire CAM_MEM and/or CAM_SD folder to your MAC
4. Disconnect the camera from your MAC
5. Connect the camera to your Windows PC
6. Copy files INDEX.BDM and MOVIEOBJ.BDM located in directory CAM_MEM/AVCHD/BDMV or CAM_SD/PRIVATE/AVCHD/BDMV on your PC to the same folder on your MAC (for example via a USB stick in case you don't have direct access from your MAC to the PC via a network) overwriting files with the same name on your MAC.
7. Disconnect camera from PC
8. Open FCPX on your MAC
9. Start Import Media function in FCPX and navigate to the CAM_MEM or CAM_SD folder in the Import Media Window ----> Your 1080P50/60 movies will now show up like all other movies and you can import them using the 'Optimized media' transcoding option for example.
This might seem a bit cumbersome but it is working. There must be a problem with the Apple OS reading files INDEX.BDM and MOVIEOBJ.BDM correctly in case the camera is directly attached to the MAC whereas this problem does not exist under Windows. The size of these files is in fact different when you transfer them directly from the camera to your MAC compared to transferring them from the camera to a Windows PC and from there to your MAC. Maybe Apple has a solution for this (without having to use any third party software or a Windows PC) but I could not yet find it in case it exists.
N.B.: Once you need to access new 1080P60/50 clips on your camera, it is enough to copy the new corresponding .MTS files from the STREAM folder, the corresponding .CPI files from the CLIPINF folder and the entire PLAYLIST folder directly from the camera to the corresponding folder on your MAC. The INDEX.BDM and MOVIEOBJ.BDM must again be copied like above.
Thanks for any comments about improving this workflow. You can of course transfer all the files from your Camera via the Windows PC to your MAC but I found it faster to copy the large .MTS files directly from the camera to the MAC.