Just purchased and installed Spitfire Audio Chamber Strings Essentials and I'm having the exact same issue as described in this closed discussion:
I have the Kontakt Player 6, 7 & 8 installed - as well as full Kontakt 7. The library shows in Kontakt Player 6, but not 7 or 8. Tried deleting and re=initializing the Kontakt files as suggested in the other discussion but it doesn't resolve the problem.
Like the other post, I can search and find patches in the library but cannot select it in the UI.
I don't use the Mac Disk Cleaner software that has been linked to other file issues.
Any help would be appreciated! Thanks.