Right now I've got a single iPhoto library sitting on a NAS, usable by one person on my network at a time. It's still an iPhoto library because we can't upgrade everyone to Yosemite just yet (so we haven't upgraded anyone). I'm looking for an app that has similar features to iPhoto or Photos in terms of library management (events, albums, thumbnails) and preferably (but not required) editing ability, but is architected to support the library living on a network share and is usable by multiple users simultaneously from different machines (supporting multiple users on the same machine via Fast User Switching would be a delightful bonus). Does anyone know of any apps like this? Hopefully something not too expensive? It definitely needs to support two+ sessions adding photos, but it's fine if they can only be queued, not done simultaneously.