Mac OS High Sierra 10.13.4
Garagesale 7.0.13 (827)
Photos 3.0 (3271.13.150)
Previously when I used Garagesale it would show the “Photos” app and it’s libraries within the folders section of Media.
I have reinstalled my Mac and my “Photos” library is now stored on an external drive (actually a Micro SD card permanently inserted in the side of the MacBook with an adapter).
The directory is appointed as the main library in “Photos” and works fine from there, it just doesn’t show in Garagesale.