It looks like this will arrive shortly on iOS devices, with 10.3. What does it offer for Macs, and when will it ship?
memory stick
Sharing docs between Macs, or with iOS devices, need not be complex or messy. You may even find OS X Server a help.
How to repartition and install El Capitan afresh on an old iMac.
How can I stop our students plugging their USB memory sticks into classroom Macs?
The Eclectic Light Company 