Reply to Tom, Russ, and Luis:
Russ - In my first post it shows that I'm running Mavericks and it is on the SSD. For clarification, since there are two other drives, both hard drives, then the idea would be to install another OS copy on one of them. That's a thought and as I'm slowly working my way through the options that will be a consideration.
Since the drive will be used just for the current un-completed and un-archived videos it wouldn't be something that I'd be going to access regularly so doing the Option Key thing wouldn't be that much of an inconvenience. My video-movie making style is evolving and I need to revisit some of the old ones and re-edit them. Also, the newer FCPX versions provide some additional tools that can improve the viewing experience - a real plus! Thanks for the idea.
PARTITIONS: As Luis pointed out in his post, one of the ways to run two versions of FCPX is to keep them apart and one way this can be done is to use a dual-boot system. Hence, my exploration into doing this.
The article about creating a dual-boot OSX system that talks about partitioning is at
http://www.larryjordan.biz/create-a-dual-boot-mac-os-x-system/
Read the first reply by Dennis at the end of the article and it is dated December 30, 2013 and that is only a little over a week ago. The fellow seems to know what he is talking about.
Larry - thanks for the link to http://support.apple.com/kb/HT5958. I see the copyright date is 2014 so it is brand new (or new additions). It is good that the http://support.apple.com/kb/HT5550 article provided a reference link to the 5958 article - that is helpful.
"Libraries FAQ" is not something I would have investigated at this stage, though, as I'm still trying to get the new update installed (without messing up X.9) ; however, the section with FAQs about "Updating" does have useful information at this stage.
From HT5958:
"How do I update my projects and events?"
The instructions in the pop-up window creates more questions than answers. For example, the 3 options are:
1. "Click Update All to create a new library for the projects and events on each connected hard disk." - Okay, so I have two hard disks. If I go the route with dedicating one for the old X.9 version, along with the X.9 Events and Projects, what happens if "Update All" is selected? Will this mess up or, if the drive requires the "Option" key, will this drive be exempt?
2. "Update Later" - this postpones updating and creates "a new empty library". So, if the .1 version is on the SSD and the new Library is on the 3TB hard drive with X.9 on the 2T hard drive (requires the Option key to access), does that mean the X.9 Events and Projects can share the 3TB drive? If so, then this way I wouldn't have to move any files and that would be a real plus.
If the 2TB drive has the X.9 version (requiring the Option key start), will X.9 be able to access the 3TB drive files?
3. "Locate" - "lets you manually navigate to a connected hard disk …" This sounds like it could be work, BUT, if it is only to Update the "selected" X.9 Projects and Events (where the user can select certain ones) then that wouldn't be too bad.
Would this option Update ALL the Projects and Events at one time, or, can they be selectively updated? Given the possibility for, ahem, "difficulties", it wouldn't be a good idea to update the entire folder because there is no telling what problems might develop. Updating piecemeal gives an opportunity to select "easy" files or files of a similar editing type. Some of my videos do have B-roll clips and that could be an issue.
This is enough for now. Those were my comments to just the first FAQ under "Updating". Like I said, I'm taking "baby steps" to hopefully avoid a catastrophic problem. Just trying to be very careful.
At this point I'm thinking of Luis' "Renaming FCPX option" and having it on the SSD as the way I'd prefer to go, with the 2TB and 3TB drives for the X.9 Projects and Events, and the .1 Library (Libraries?). This option would avoid installing another instance of OSX and having to use the Option key trick.
How does this plan sound?