Official updates for the non-subscription version of Illustrator CS6 peaked at Version 16.0.3 (Windows) Version 16.0.4 (Mac) Adobe Help Center Official Updates
To run Adobe Illustrator CS6 effectively on 32-bit or 64-bit systems, the following minimum specifications are required: Windows Requirements Mac OS Requirements Intel Pentium 4 or AMD Athlon 64 Multicore Intel with 64-bit support OS Windows XP (SP3) or Windows 7 (SP1) Mac OS X v10.6.8 or v10.7 RAM 1GB (3GB recommended) 2GB (8GB recommended) Hard Disk 2GB available space 2GB available space Display 1024x768 (1280x800 recommended) 1024x768 (1280x800 recommended) GPU OpenGL 2.0–capable system OpenGL 2.0–capable system The "Updated Patch" and Version 16.0.2 Adobe Illustrator CS6 16.0.0 -32-64 Bit- Updated Patch
Illustrator CS6 broke the long-standing limitation of applying gradients only across an entire object. Version 16.0.0 allowed users to apply linear or radial gradients directly to a stroke: The gradient flows along the path normally. Adobe Illustrator CS6 16.0.0 -32-64 Bit- Updated Patch