To be honest I have the same problem. Just two days ago I wa srecording a mix and it frooze but the song was still playing but I had no control over any of the funcitions.
Then a couple weeks a go it “close unexpectedly” while I was putting together a remix set…after I reopened it, the remix set I was workign on was completely gone.
I have a MBP too and im scared for my next gig! I do actually have an s2, KA6, maschine mikro and f1 hooked up via a usb hub. Assuming that may be the problem but I hope not as I like to use them all at the same time. This really only started happening after I installed 2.5. Maybe I’ll try dl 2.6.1