Firmware Updates & AdvisoriesSigma “SIGMA Photo Pro 6.5.5 for Macintosh“ is the Latest RAW Processing Software (2017.09.29): Compatible with the Mac OS X 10.13 (High Sierra) SIGMA Photo Pro 6.5 is an exclusive software package for displaying and manipulating RAW images taken with all SIGMA digital cameras on your computer. This is an update to the previous blog, Sigma Advisory:... 2017-10-022 min read