Red Rock Software today announced the availability of Red Rock DeltaGraph 5.5, the latest version of the company’s data analysis, charting and graphing software. The free upgrade provides several new advanced graphing, presentation and rendering capabilities for Mac OS X and Mac OS 9 users. In addition, the Red Rock DeltaGraph 5.5 upgrade is compatible with Mac OS X Panther, “making the most of the sophisticated features found in the new operating system.” DeltaGraph 5.5 Mac is available for free of charge to registered users of DeltaGraph 5.x Mac.