I did nail down the cause of this: my ignorance of System 6. There's a version of System 6 that is just a file server...I believe I have a copy of it now in my files. However, it precludes the use of the machine as a regular computer - it just becomes a dedicated file server. There's no file sharing while using the machine as normal as you do in System 7.I'm also wondering: is it possible to be an AppleShare client under System 6, connected to a System 7 server? That was a thread about this you started a few years ago, but it ended without resolution. It seems that maybe you need a System 6 Workstation disk, but I haven't found this, and I'm not sure if it's an alternative version of System 6 or just an extension you throw into the System folder. To add to the challenge, I'm hoping to do all this on a Mac Plus booted from a floppy drive, so the boot disk needs to be 800K.