Missing libraries in Kontakt 8

Be sure to be using latest version of Native Access for your OS

They were there before, they are installed and they are in Native Access.

What does it says exactly in N.A. installed or 'Locate' ? If it says 'locate' then you need to locate the libraries first in Native Access and the also first run Kontakt as stand alone before using in a DAW.

Else try resetting the Native Access XML file , look at section 8 here : My Product is Missing in Native Access

And then reinitialize the KONTAKT Database

Also , general advice and prerequisites for Mac users are :

You need to do all of the Mac users must do when using N.I. software (please read and do all) :

ALL NI apps including NTKDaemon must have full disk access. : How to Enable Full Disk Access on macOS and disks must be of correct format : Notes on Network Drives and Disk Formats

Also then please check that iCloud Private Relay has been turned off : Native Access Error Message: "Download failed" (macOS)

Also then do not use Clean My Mac.

And quote Kymeia : if using Sequoia then N.I. apps must be added to the Local Network