Update: There is no solution. After I got the .qtz file into /Library/Compositions, it didn't work, and then I found out that third-party visualizers have been disabled as of iTunes 12.6. It may still work on previous iTunes versions, but I do not know.
On 10.12.6, I am trying to install an iTunes visualizer, but there's no way to progress past this screen.
It is supposed to be installed to /Library/Compositions, so I tried
sudo installer -pkg ~/Downloads/wowlab_oneday_1.0.1/wowlab_oneday_1.0.1.pkg -target /Library/Compositions
The result was:
installer: Error trying to locate volume at /Library/Compositions
The same error occurred regardless of the destination specified.
These are the files Installer wants to install:
When I expand wowlab_oneday_1.0.1.pkg with Unarchiver, it contains a Resources folder, Distribution file, and wowlaboneday.pkg. This second .pkg can't be extracted with Unarchiver. When I click Show Package Contents, it contains Bom, PackageInfo, and Payload.
How can I get the .qtz file out and into /Library/Compositions, presuming that's what needs to be done?