This support page applies to a firmware update service for improvement of the performance and compatibility of the Four Thirds system.There is a "LICENSE AGREEMENT" you will have to agree to before download the firmware program.This license agreement must be agreed by you, before you will be allowed to download, install and use this program.
SIGMA Photo Pro Software
SIGMA Photo Pro 3.5.2 for Windows and SIGMA Photo Pro 3.3 (build 1019)for Macintosh Software
[09/7/2]
The firmware update program for SIGMA’s Four Thirds mount lenses.
Please update the firmware of your SIGMA lens with your camera body.
Please refer to the support page of your camera body's manufacture for firmware update instructions.