Thanks @Alex4D! This is very cool and badly needed in our FCPX workflow where I work. For now I’ll be the only one using it to be sure it doesn’t break anything that might be vital, but I look forward to implementing this for all seven edit bays once the dust settles with all the new Apple stuff coming out this Fall.
For whatever it’s worth: I tried this in El Capitan on my home computer, (after making, renaming and relocating a copy of the FCPX app.). Works like a charm. I stacked up to 10 video clips and the Overlay showed up for each one, including a few audio-only clips. I was curioius to see how it would handle a Multicam Clip, so I experimented with that a little too.
Once you put the Multicam Clip on the timeline the TC Overlay only indicates where the playhead is on the timeline. I haven’t decided how important it might be to see the TC of the embedded clips in the Overlay, but I can immediately say that it would be nice. If you double-click on the Multicam clip and expaned it on the timeline you will then be able to see the TC of each clip in the Overlay, which, is great in those instances where one or more of the clips is just a bit off. It can also be useful on those rare occasions when you want to manually add more clips to an existing Multicam Clip and not all of the camera TC matches for the same Scene and Take.