Trying to locate the logic instrument pack on my HD. Earlier versions had them in Library/app support/Logic, but no such file exists.
How to find your root Library folder:
Open your startup disk in Finder, either by clicking the name of your startup disk (e.g. Macintosh HD) in the sidebar, or by pressing ⇧⌘G and entering /.
You should have these 4 folders. Open Library.