The install of H4 on my Mac Pro is intact: HALion Sonic purchased after installing C6, updated to v1.52, then purchased H4 when the upgrade from HS became available. The library is on a separate internal drive.
The issue is with the install on my MacBook Pro with the library on an external FW hd. I first noticed it when trying to load various pianos: Warm Grand, Dark Piano, etc
I reinstalled all (HS and H4) content onto the external drive. The user>Library>Application Support>Steinberg>Content>HALion>VST Sound folder has short cuts to all sounds on the external drive, with the following sounds locally installed (and also on the ext hd).
FCP_SMT_
061
079
081
083
085
087
100
Iām probably did something wrong, but making aliasā of the VST Sound Contents, copying them to my ext hd, etc, then hit Rescan disk does not resolve the issue.
I wonder if I should completely uninstall HS and H4, erase content on the ext hd and then do a fresh install.
The Mac Pro install was problem free. Not sure what went wrong here.