!HOW! 🙂
All I can think of to do is to porting them over via a direct midi to midi connection from one Mac to another.,
* my situation *Now it is time for a new studio and picking up the pieces.
Now, years ago I had to do this same gymnastic effort to transport some very old Apple][GS sequencer files (I'm old) to my G4 Mac Platinum tower machine (OS 9.3). I managed to save a lot of my work by putting midi cables between the machines and sending the midi commands (playing as midi - as if I were sending them to a midi device) from the ][GS to the Mac G4 - just playing the midi commands out the midi port & into the midi port of the other machine whilst recording it all on the G4 (then saving the resulting file and later splitting the midi by channel).
Now, as soon as the new gear is purchased, I will have OS9.3 Logic files (I think Delta was circa 1999) to port over to Logic 10. Ancient files.
Way back then when my wife bought me a good good sound card, it came with the limited "Delta" release of Logic (which the included adverts did not SAY was limited). I had low funds then, so I used that version I had. At the time Logic cost about $1500 or $2000 or some other obscene amout and the 'full' versions used that stupid unreliable dongle.
So now days I have hours of music sitting on that G4, which at this moment is gathering dust, but worked fine last time I turned it on and recorded something about 6 years ago (was I was last well enough to as increasing disability had kept me from doing music or much of anything).
Now here I am getting better due to learning how to treat myself (doctors are useless for chronic health issues) and so I can look forward to scoring and recording music again - not gigs - but at least recording. I am going to have all new studio gear (wife insists on paying for it). However, I will want to port my old "delta Logic" OS 9.3 files over to MAC OSX Logic 10.
I still have my old G4 Platinum tower machine, and if all else fails I can send it through midi to the new mac, and just copy the rest of the AAF a WAV files from the old mac to the new one through the network. It will suck and mean manually repositioning every single mix-down or loop into the new version on the new (to be purchased) mac
I just wish there was some old program out there (not Logic as Apple has cut off everything old) that was friendly enough to import and export to lots of file formats. I think a lot of people want that and would $pay$ for it.