Ensuring openability/playability of older Logic Pro X Projects

Hi guys,

Thanks so much for this helpful info. I must say it's a little more ominous and uncertain than I was expecting and has me a bit worried. Especially your last paragraph, "yoyoben." Though I understand it's correct and justified. 

I have never used (as far as I know) any samplers of the sort you describe, Eddie, nor have I ever used any third party plug-ins, so I suppose that eliminates one source of incompatibility. I have always tried to only use the basic stuff available within any DAW. I just opened up a random track and sounds I see are things (synths and drums) like "Hip hop sub bass," "lunar pools," "deep tech," "classic drum machine," "classic simple pad," "digital wave," "dark matter," "arcade synth," etc. And for each of these, of course, some effects. "Remix FX" applied to the master often. I don't own the newer computer yet, nor, because of its price, do I expect to very soon, and as of yet no one has come out of the woodwork to offer me 10 hours of free use of their M4 Pro with the latest version of Logic (which would allow me to test the tracks..when I said "track by track," in my original post, I meant each individual song. I realize "track" means each individual piece of a song.)

So..is there any manual or tool or guidebook by which I might get a rough sense of what will work and what won't (the "some features and settings" you mention, Eddie), so that, if necessary, I can..."bounce to audio," as you recommend, sooner rather than later, and not risk problems when the death of my current one necessitates a transition? I get that there are "sound libraries" (?) (where I find "Arcade Synth," say), effects, and other features of various kinds, for any DAW, some of which you have to get outside the DAW and use within it. But that's about the limit of my knowledge. I put "bounce to audio" in quotes because I'm still a little hazy on the meaning of this. I've started to bounce the entire songs to files playable within iTunes, just so if things go awry, I have a playable version of what I ended up with, but you guys seem to be saying that within a song you can (what I remember might be called "freeze" in Cubase, the other DAW I use) bounce each individual track as a piece of audio and then when the entire song is opened up later, elsewhere, what plays is the collection of those frozen pieces of audio (no real time processing of the audio is required of the DAW, and so no incompatibilities)...In that case, are you rendering anything frozen unalterable/uneditable in the future? Ideally, I'd keep each part editable, even if that comes at the expense of a few occasional glitches after the transfer. 

Also, is this the sort of laptop on which I might get Mojave or another not up-to-date OS, where I could use the older version of Logic? 

https://www.bestbuy.com/site/apple-macbook-pro-13-3-certified-refurbished-intel-core-i5-2-3ghz-with-8gb-memory-256gb-ssd-2017-silver/6465448.p?skuId=6465448

I also see nothing online suggesting that the newest Macbook Pro available would not run the version of Logic I have currently, so that seems like the first step if I have compatibility issues. 

Finally, I'm happy you suggested the idea of backing up the application itself, because I found this page

Back up Logic Pro for Mac - Apple Support

and it seems to describe the solution you're talking about... that doesn't require the use of the "Purchased" tab at all? 

I apologize for the length, just really want to understand the situation better,

John

I see I replied to myself...oops. I hope that doesn't render my reply invisible to you guys! Thanks again for your time and help!