First, I'm gonna say what I think it's the right thing to do to edit 7d footy on a mac, considering friends tips and video tutorials.
1 - Convert the clips to Apple ProRes 422
2 - Import the clips to Final Cut, and drag one to the timeline so that it asks if I wanna change the timeline settings.
3 - Click YES.
4 - Edit the Video and export it as Apple ProRes 422.
5 - Convert the video to H.264 (limiting data rate to 5.000kbps) using MPEG Stream Clip
6 - Upload on Vimeo, in my case.
Problems I've had doing all the steps above:
1 - After exporting the video as Apple ProRes 422, the video playback is really bad, it freezes, jumps parts but the audio works normally.
2 - I've just exported a 0:59 video ( doing all the steps above as well) but the final video is 1:59. There's 1 minute with nothing... just the black screen, no clips and no sound. The weirdest thing is that I checked the time line and it goes only until 1:09, how can the final video be 1:59.