I'm on Yosemite - Pro X has been running fine for over a year and last week without patching anything Logic has started crashing on startup of most of my projects.
I ended up removing it and all prefs, drivers and plugins. Still no joy - it only seems to crash on projects from the last year or so - anything older than that is working, and a brand new project is ok from last week.
Attached the crash report as a .doc - any advice is gratefully received.
crashreport.doc
Many thanks,
Dave