SpiderOak Mac for Mac

SpiderOak is a cross-platform, multi-computer online backup, centralization, and sharing system coded in Python and C. Capabilities include comprehensive "zero knowledge" encryption, space efficient preservation of historical versions of files, and access to files across all computers from any device. Backed up folders may be include in web "Share Rooms" for easy sharing/collaboration. Great emphasis is made towards triviality of installation and operation.