Q: I have an iTunes library stored on a NAS. I bought a new computer and turned on home sharing, but the “sharing” doesn’t show up in iTunes on the new computer, and I can’t locate the library via my home’s wireless network. How can my new computer access the library without copying everything over to the new machine? I want just one library but I want to access the music from all my computers. - Rob A: It’s important to keep in mind…