How to save 10.2.1. project to 10.1.4 compatible format

I have both mavericks an yosemite system on my machine.
I prefer mavericks as it is faster then yosemite, expecially in youtube and other internet related things...
So, on the yosemitee I have the fcpx 10.2.1 version, and on mavericks the 10.1.4 version. Unfortunately as I opened some 10.1.4 projects on the 10.2.1 fcpx, it converted immediately to the new format.
I can not open anymore thus projects in 10.4.1....

How can I save my 10.2.1 projects in 10.4.1 compatible format again? (even if there will be some effect loss...)
It is very important because in my team there are some who use only mavericks yet.

Well you could try exporting an XML but I doubt that's going to be successful. Your only real option is just to export a ProRes 422 Quicktime file and import it into 10.1.4.

FCP X has the capability to export XML in either 1.5 version or 1.4 version - the latter may work, but I haven't tried it.

We've tried it and it does work. But we've not done much of it. How far back does FCPXML version 1.4 go with FCPX versions?

FCPXML 1.4 goes back to 10.1.0.

Yes you can use XML to port a 10.1.2 project back to 10.1.4. All if not most of your Project will be preserved. The only thing that might not transfer properly are third party effects and titles, as well as any new features that were added since 10.2 (Bezier Masks, 3D titles...).

Here's a timeline called "Visie 2020" with compound clips, transitions, green keys, titles, animations, video effects, color corrections, generators, secondary storylines with transitions and audio with effects in 10.2.1:



I export a Project XML and I make sure to use the previous (1.4) XML version:



Then I launch FCP X 10.1.4:



I import the "Visie 2020" Project XML in 10.1.4:



FCP X immediately connects to the media and opens the Visie 2020 Project. Everything has been properly ported over, except for the bezier masks I had used to mask out the green keys (a 10.2 feature):



So I would say FCPXML works much better than most people think.

- Ronny

Thank you Ronny !
I'm just back from the long weekend, so I see your reply now. It sounds very good. i will try it within minutes
It was important, because in our small team we use mavericks and yosemite mixed
Thanx again!