I'm a novice Logic user. It's been a while since I've used Logic (I'm using 9.1.8 )--in the time since then I've both gotten a new computer (MacBook Air running 10.9.1), restored it from a backup since the old one was stolen, and updated operating systems. Now I'm trying to open a project and I keep getting error messages like these: Not EVERY instrument in the project is missing, but the majority are. I've reindexed the hard drive on Spotlight and I've reinstalled Essential Content, Additional Content, and GarageBand Content, but nothing doing. I know that I should check the Logic folder in Application Support, but I don't know what I should be looking for. Here's a shot of some of its contents: Since the Full Brass is one of the instruments missing, it seems interesting that in "Orchestral" I only have "Choir" and not "Brass" or "Winds" or anything. Also, here's a shot of some of the contents of "Acoustic Pianos/Yamaha Grand Piano." I note that the file that Logic claims is missing (in the first shot above) is NOT in the list of files. What should/can I do? Thanks for your help, and for your patience with a novice.