I've managed to get file-sharing organised between two of my computers. But…
If I connect to my Air from my iMac, it shows four folders: main account, main account public folder, hard drive and… aluminium.
If I click on alumimium I can see the usual sub-folders, Desktop, Downloads, etc. I can send files from the iMac to the Mac Air and the other way around as well.
But on the Air machine, no mention of aluminium appears. Search reveals nothing, nor a search for a file that I've copied to aluminium from the iMac. (Sorry about the complication).
I've re-started both machines, and that's about the limit of my technical ability.
Any bright ideas?