How can I share the same Photos library between multiple user accounts on the same machine
I currently have my photos library on an external drive. "Ignore ownership on this volume" is set. The first user that logs into the machine and opens photos obtains a permanent lock on the database. There's a process named photolibraryd that sits and keeps a lock on the top level Photos.photoslibrary directory. According to the system log this lock is what is preventing other users from opening the library.
I get that you can't have two people accessing the same library at the same time. Is there any way to make this work? iCloud sharing seems to be limited to 5000 images (roughly a 10th of what I have)