Mac users interested in Spideroak osx 10.5 generally download:
SpiderOak is a multi-platform secure online backup, storage, access, and sharing solution engineered for the consumer and small businesses. You must first sign up to use SpiderOak.
Running natively on Mac OS X, Windows, and Linux, SpiderOak allows users to create a central storage repository where they can access data from all their SpiderOak devices within the application, or via Web login at SpiderOak.com.
SpiderOakONE lets you back up and synchronize data among multiple devices. It uses an online service which has a desktop application available for different platforms. The client has a quite intuitive interface with various tabs. In this regard, you will probably find that the Dashboard tab is the most useful as it allows accessing multiple features and monitoring the status of the tasks.