If the other machines on your LAN include Windows or Linux boxes, you could use Photos.app in a macOS VM to bulk download the files; here are some projects that

If the other machines on your LAN include Windows or Linux boxes, you could use Photos.app in a macOS VM to bulk download the files; here are some projects that make it easy: macos-virtualbox: "Push-button installer of macOS Catalina, Mojave, and High Sierra guests in Virtualbox for Windows, Linux, and macOS" https://github.com/myspaghetti/macos-virtualbox https://github.com/myspaghetti/macos-virtualbox macOS-Simple-KVM: "Tools to set up a quick macOS VM in QEMU, accelerated by KVM." https://github.com/foxlet/macOS-Simple-KVM https://github.com/foxlet/macOS-Simple-KVM